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65-578: The club was officially opened on July 29, 1979, with an initial membership of 350. Construction on the original 300 metre breakwater was completed by 1983. Griffiths Rankin Cook Architects won an architectural award in 1990 for the design of the main clubhouse. The main areas include hand and vehicle launch ramps; green and blue gazebos; Clubhouse, Registration, Office and Washrooms; youth sailing pavilion, first aid, washrooms, changing facility; wheelchair pathway; parking and dock access. Membership today

130-475: A coastal management system, breakwaters are installed parallel to the shore to minimize erosion . On beaches where longshore drift threatens the erosion of beach material, smaller structures on the beach may be installed, usually perpendicular to the water's edge. Their action on waves and current is intended to slow the longshore drift and discourage mobilisation of beach material. In this usage they are more usually referred to as groynes . Breakwaters reduce

195-691: A vagrant in England, Greenland , Hawaii , and the Azores . The great white heron is unique to South Florida, including Great White Heron National Wildlife Refuge in the Florida Keys. The primary food for the great blue heron is fish . While they can prey on various sizes of fish from small fingerlings to large adult fish, measuring 60 cm (24 in) in length and weighing around 900 g (2.0 lb), small to medium-sized fish around 10–20 cm (3.9–7.9 in) are usually preferred. Primary prey fish

260-1010: A Provincial Training Centre for 2012, NSC supports the training of Athletes at the Olympic level. As a Development Training Centre for 2012, NSC supports the training of Athletes from the Grassroots to the National Team Level and supports the development of Coaches from Level 1 (CANSail 1&2) to Level 4–5. The Britannia Yacht Club is developing a joint marketing campaign with the Nepean Sailing Club to increase awareness of recreational and competitive sailing in Ottawa. Through Advantage Boating, there are adult and children's Learn to Sail Programs. 45°21′14″N 75°49′27″W  /  45.353936°N 75.824078°W  / 45.353936; -75.824078 Breakwater (structure) A breakwater

325-464: A breeding colony, the colony can sometimes be abandoned by the other birds. The primary source of disturbance and breeding failures at heronries is human activities, mostly through human recreation or habitat destruction , as well as by egg-collectors and hunters. John James Audubon illustrates the great blue heron in Birds of America , Second Edition (published, London 1827–1838) as Plate 161. The image

390-478: A club of the Canadian Yachting Association . Some events are interclub, which means that boats from all sailing clubs on Lac Deschênes may participate. Many racing events are held in cooperation with the nearby Britannia Yacht Club and Club de voile Grande-Rivière. BYC & NSC have a schedule of cruising and day sailing events organized by the membership for fun, as memorials for members who serve in

455-710: A fleet of Martin 16 boats, wheel-chair access, and an active team of volunteers who escort the boats. A number of trophies and awards are presented for evening and series events in addition to the trophies listed in Special events. The aggregate trophies awarded on basis of points earned in evening and weekend events include the Nautilus Trophy, Journal Trophy, Kelpie Cup, C&C 27 Overall Champion, and Jam Dish. Interclub awards are scored for series racing: The Chandlery Cup, Kirby 25 Best Performance Trophy, Authentic Yachts Trophy, NSC Beagle Bown, and Keepers. Mondays typically see

520-415: A function of the distance the breakwaters are built from the coast, the direction at which the wave hits the breakwater, and the angle at which the breakwater is built (relative to the coast). Of these three, the angle at which the breakwater is built is most important in the engineered formation of salients. The angle at which the breakwater is built determines the new direction of the waves (after they've hit

585-423: A large goliath heron. Notable features of great blue herons include slaty (gray with a slight azure blue) flight feathers , red-brown thighs, and a paired red-brown and black stripe up the flanks; the neck is rusty-gray, with black and white streaking down the front; the head is paler, with a nearly white face, and a pair of black or slate plumes runs from just above the eye to the back of the head. The feathers on

650-521: A regular weekday evening racing schedule and a weekend racing schedule organized by the membership. Members of the NSC High Performance Team have the opportunity to learn what it is like to compete against the best in the world, and the experience they gain at races and regattas will certainly help them as they progress in their sailing careers. A distance race or regatta can be observed almost every weekend. Some events are open to any member of

715-442: A significant saving over revetment breakwaters. An additional rubble mound is sometimes placed in front of the vertical structure in order to absorb wave energy and thus reduce wave reflection and horizontal wave pressure on the vertical wall. Such a design provides additional protection on the sea side and a quay wall on the inner side of the breakwater, but it can enhance wave overtopping . A similar but more sophisticated concept

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780-469: A single breeding season, individuals usually choose new mates each year. Males arrive at colonies first and settle on nests, where they court females; most males choose a different nest each year. Great blue herons build a bulky stick nest . Nests are usually around 50 cm (20 in) across when first constructed, but can grow to more than 120 cm (47 in) in width and 90 cm (35 in) deep with repeated use and additional construction. If

845-465: A total lack of pigment in its plumage. It averages somewhat larger than the sympatric race A. h. wardi and may be the largest race in the species. In a survey of A. h. occidentalis in Florida, males were found to average 3.02 kg (6.7 lb) and females average 2.57 kg (5.7 lb), with a range for both sexes of 2.0 to 3.4 kg (4.4 to 7.5 lb). This is mainly found near salt water, and

910-488: A track, the front toes, as well as the back, often show the small talons. The subspecies differ only slightly in size and plumage tone, with the exception of A. h. occidentalis , native to South Florida, which also has a distinct white morph , known as the great white heron (not to be confused with the great egret , for which "great white heron" was once a common name). The great white heron differs from other great blues in bill morphology, head plume length, and in having

975-489: A white breast and neck. The five subspecies are: The great blue heron is the largest heron native to North America. Among all extant herons, it is surpassed in size only by the goliath heron ( Ardea goliath ) and the white-bellied heron ( Ardea insignis ). It exhibits a minor degree of sexual dimorphism ; males are slightly larger than females, but otherwise the sexes are not easily outwardly distinguishable. It has head-to-tail length of 91–137 cm (36–54 in),

1040-649: A wingspan of 167–201 cm (66–79 in), a height of 115–138 cm (45–54 in), and a weight of 1.82–3.6 kg (4.0–7.9 lb). In British Columbia , adult males averaged 2.48 kg (5.5 lb) and adult females 2.11 kg (4.7 lb). In Nova Scotia and New England , adult herons of both sexes averaged 2.23 kg (4.9 lb), while in Oregon , both sexes averaged 2.09 kg (4.6 lb) Thus, great blue herons are roughly twice as heavy as great egrets ( Ardea alba ), although only slightly taller than them, but they weigh only about half as much as

1105-563: Is a large wading bird in the heron family Ardeidae , common near the shores of open water and in wetlands over most of North and Central America, as well as far northwestern South America, the Caribbean and the Galápagos Islands . It is occasionally found in the Azores and is a rare vagrant to Europe. An all-white population found in south Florida and the Florida Keys is known as

1170-432: Is a permanent structure constructed at a coastal area to protect against tides, currents, waves, and storm surges. Breakwaters have been built since antiquity to protect anchorages , helping isolate vessels from marine hazards such as wind-driven waves. A breakwater, also known in some contexts as a jetty or a mole , may be connected to land or freestanding, and may contain a walkway or road for vehicle access. Part of

1235-442: Is a single report that a large bobcat ( Lynx rufus ) managed to subdue and kill an adult great blue heron. Using its considerable size and dagger-like bill, a full-grown heron can be a formidable foe to a predator. In one instance, during an act of attempted predation by a golden eagle, a heron was able to mortally wound the eagle, although it succumbed to injuries sustained in the fight. When predation on an adult or chick occurs at

1300-651: Is a wave-absorbing caisson, including various types of perforation in the front wall. Such structures have been used successfully in the offshore oil-industry, but also on coastal projects requiring rather low-crested structures (e.g. on an urban promenade where the sea view is an important aspect, as seen in Beirut and Monaco ). In the latter, a project is presently ongoing at the Anse du Portier including 18 wave-absorbing 27 m (89 ft) high caissons. Wave attenuators consist of concrete elements placed horizontally one foot under

1365-589: Is almost 1900 members. The club maintains its emphasis on sailing. The club has floating dock facilities for over 500 boats. The club also maintains an active dry sail program for day-sailing. The sailing season extends from mid-April to late October. Sail training programs are active during the summer months for both youth and adults. Every year the club hosts sailing regattas that attract sailors from across Canada and internationally. The local racing scene consists of fleet, PY and PHRF races on an almost daily basis along with special racing events on weekends throughout

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1430-518: Is designed to absorb the energy of the waves that hit it, either by using mass (e.g. with caissons), or by using a revetment slope (e.g. with rock or concrete armour units). In coastal engineering , a revetment is a land-backed structure whilst a breakwater is a sea-backed structure (i.e. water on both sides). Rubble mound breakwaters use structural voids to dissipate the wave energy. Rubble mound breakwaters consist of piles of stones more or less sorted according to their unit weight: smaller stones for

1495-430: Is limited in practice by the natural fracture properties of locally available rock. Shaped concrete armour units (such as Dolos , Xbloc , Tetrapod , etc.) can be provided in up to approximately 40 tonnes (e.g. Jorf Lasfar , Morocco), before they become vulnerable to damage under self weight, wave impact and thermal cracking of the complex shapes during casting/curing. Where the very largest armour units are required for

1560-400: Is quite adaptable and may be seen in heavily developed areas as long as they hold bodies of fish-bearing water. Great blue herons rarely venture far from bodies of water, but are occasionally seen flying over upland areas. They usually nest in trees or bushes near water's edge, often on islands (which minimizes the potential for predation) or partially isolated spots. It has been recorded as

1625-575: Is too large. They are generally solitary feeders. Individuals usually forage while standing in water, but also feed in fields or drop from the air, or perch, into water. Mice are occasionally preyed on in upland areas far from the species' typical aquatic environments. Occasionally, loose flocks gather to feed, and may be beneficial since they are able to locate schools of fish more easily. As large wading birds, great blue herons are capable of feeding in deeper waters, thus are able to harvest from niche areas not open to most other heron species. Typically,

1690-652: Is usually relatively close, usually within 4 to 5 km (2.5 to 3.1 mi), to ideal feeding spots. Heronry sites are usually difficult to reach on foot (e.g., islands, trees in swamps, high branches, etc.) to protect from potential mammalian predators. Trees of any type are used when available. When not, herons may nest on the ground, sagebrush, cacti, channel markers, artificial platforms, beaver mounds, and duck blinds. Other waterbirds (especially smaller herons) and, occasionally, even fish and mammal-eating raptors may nest amongst colonies. Although nests are often reused for many years and herons are socially monogamous within

1755-1014: Is variable based on availability and abundance. In Nova Scotia , 98% of the diet was flounder . In British Columbia , the primary prey species are sticklebacks , gunnels , sculpins , and perch . California herons were found to live mostly on sculpin, bass , perch , flounder , and top smelt . Besides fish, it is also known to feed on a wide range of prey opportunistically. Amphibians such as leopard frogs , American bullfrogs , toads and salamanders are readily taken, as well as reptiles such as small turtles , snakes and lizards . They can take on sizeable snakes, including water snakes 105 cm (41 in) in length. Aquatic crustaceans (such as crayfish , shrimp and crabs ), grasshoppers , dragonflies and aquatic insects are taken as supplementary prey. They also prey on small mammals including shrews , rats , ground squirrels , and moles . One study in Idaho showed that from 24 to 40% of

1820-452: The Old World is filled by the congeneric grey heron ( Ardea cinerea ), which is somewhat smaller (90–98 cm (35–39 in)), and sports a pale gray neck and legs, lacking the brown hues of the great blue heron. The great blue heron forms a superspecies with the grey heron which also includes the cocoi heron of South America, which differs in having more extensive black on the head and

1885-464: The great white heron . Debate exists about whether these white birds are a color morph of the great blue heron, a subspecies of it, or an entirely separate species. The great blue heron was one of the many species originally described by Carl Linnaeus in his 18th-century work, Systema Naturae . The scientific name comes from Latin ardea , and Ancient Greek ἐρῳδιός ( erōdios ), both meaning "heron". The great blue heron's niche in

1950-864: The Canadian Forces, and as fundraisers for local charities. Nepean Sailing Club also features a restaurant named "The Galley". It is open to the public, and features a patio overlooking the harbour. The Galley can be found on the upper floor of the clubhouse, and has a large room that can be rented for events. For birdwatchers, species in or passing through the area include Arctic tern , black tern , New World blackbirds , black brant , Canada geese , common goldeneye , common merganser , common tern , double-crested cormorants , great blue heron , green-winged teal , gulls , killdeer , northern pintails , rails , red-throated loon , ring-billed gull , songbirds , spotted sandpiper , swallows , loggerhead shrike , least bittern , and wood ducks . The fish species in

2015-466: The Newport breakwater. The dissipation of energy and relative calm water created in the lee of the breakwaters often encourage accretion of sediment (as per the design of the breakwater scheme). However, this can lead to excessive salient build up, resulting in tombolo formation, which reduces longshore drift shoreward of the breakwaters. This trapping of sediment can cause adverse effects down-drift of

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2080-536: The Ottawa River near BYC include brown trout , small mouth bass and walleye . The reptiles , amphibians , and salamanders include American eels , American ginseng , American bullfrog , green frog , mudpuppy , painted turtles , snapping turtles , spotted turtle , and spring peeper . The mammals in the area include beaver , coyotes , eastern chipmunks , mink , muskrat , otter , porcupine , raccoons , red foxes , red squirrels , and woodchucks . As

2145-608: The Southern United States southwards, and on the lower Pacific coast , they are year-round residents. However, their hardiness is such that individuals often remain through cold northern winters, as well, so long as fish-bearing waters remain unfrozen (which may be the case only in flowing water such as streams, creeks, and rivers). The great blue heron can adapt to almost any wetland habitat in its range. It may be found in numbers in fresh and saltwater marshes , mangrove swamps, flooded meadows, lake edges, or shorelines . It

2210-520: The United States Army Corps of Engineers Coastal engineering manual (available for free online) and elsewhere. For detailed design the use of scaled physical hydraulic models remains the most reliable method for predicting real-life behavior of these complex structures. Breakwaters are subject to damage and overtopping in severe storms. Some may also have the effect of creating unique types of waves that attract surfers, such as The Wedge at

2275-417: The bill is dull gray-yellow. Among standard measurements, the wing chord is 43–49.2 cm (16.9–19.4 in), the tail is 15.2–19.5 cm (6.0–7.7 in), the culmen is 12.3–15.2 cm (4.8–6.0 in), and the tarsus is 15.7–21 cm (6.2–8.3 in). The heron's stride is around 22 cm (8.7 in), almost in a straight line. Two of the three front toes are generally closer together. In

2340-641: The breakwaters), and in turn the direction that sediment will flow and accumulate over time. The reduced heterogeneity in sea floor landscape introduced by breakwaters can lead to reduced species abundance and diversity in the surrounding ecosystems. As a result of the reduced heterogeneity and decreased depths that breakwaters produce due to sediment build up, the UV exposure and temperature in surrounding waters increase, which may disrupt surrounding ecosystems. There are two main types of offshore breakwater (also called detached breakwater): single and multiple. Single, as

2405-403: The breakwaters, leading to beach sediment starvation and increased coastal erosion . This may then lead to further engineering protection being needed down-drift of the breakwater development. Sediment accumulation in the areas surrounding breakwaters can cause flat areas with reduced depths, which changes the topographic landscape of the seabed. Salient formations as a result of breakwaters are

2470-450: The choice depending on tidal range and water depth. They usually consist of large pieces of rock (granite) weighing up to 10–15 tonnes each, or rubble-mound. Their design is influenced by the angle of wave approach and other environmental parameters. Breakwater construction can be either parallel or perpendicular to the coast, depending on the shoreline requirements. Great blue heron The great blue heron ( Ardea herodias )

2535-455: The closely related and similarly sized cocoi heron ( A. cocoi ). The cocoi is distinguished by a striking white neck and solid black crown, but the duller juveniles are more easily confused. More superficially similar is the slightly smaller grey heron, which may sometimes appear as vagrants on the northern coasts of North America. The grey heron (which occupies the same ecological niche in Eurasia as

2600-461: The collided wave energy and prevent the generation of standing waves. As design wave heights get larger, rubble mound breakwaters require larger armour units to resist the wave forces. These armour units can be formed of concrete or natural rock. The largest standard grading for rock armour units given in CIRIA 683 "The Rock Manual" is 10–15 tonnes. Larger gradings may be available, but the ultimate size

2665-461: The core and larger stones as an armour layer protecting the core from wave attack. Rock or concrete armour units on the outside of the structure absorb most of the energy, while gravels or sands prevent the wave energy's continuing through the breakwater core. The slopes of the revetment are typically between 1:1 and 1:2, depending upon the materials used. In shallow water, revetment breakwaters are usually relatively inexpensive. As water depth increases,

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2730-557: The course of the ensuing winter. Young herons are not as successful at fish capture as adults, as strike rates are similar, but capture rates are about half that of adults during the first two months after fledging. Predators of eggs and nestlings include turkey vultures ( Cathartes aura ), common ravens ( Corvus corax ), and American crows ( Corvus brachyrhynchos ). Red-tailed hawks ( Buteo jamaicensis ), American black bears ( Ursus americanus ), and raccoons ( Procyon lotor ) are known to take larger nestlings or fledglings, and in

2795-639: The diet was made up of voles . Remains of muskrats ( Ondatra zibethicus ) and long-tailed weasels ( Mustela frenata ) was also found in pellets during the study. There are reports that great blue heron prey on both young and adults of eastern cottontails ( Sylvilagus floridanus ). Though not often, birds such as black rails ( Laterallus jamaicensis ), phalaropes , American dippers ( Cinclus mexicanus ), pied-billed grebes ( Podilymbus podiceps ) and chicks of marsh terns ( Chlidonias ) are also taken. Herons locate their food by sight and usually swallow it whole. They have been known to choke on prey that

2860-525: The effect of the incident wave, creates waves in phase opposition to the incident wave downstream from the slabs. A submerged flexible mound breakwater can be employed for wave control in shallow water as an advanced alternative to the conventional rigid submerged designs. Further to the fact that, the construction cost of the submerged flexible mound breakwaters is less than that of the conventional submerged breakwaters, ships and marine organisms can pass them, if being deep enough. These marine structures reduce

2925-406: The free surface, positioned along a line parallel to the coast. Wave attenuators have four slabs facing the sea, one vertical slab, and two slabs facing the land; each slab is separated from the next by a space of 200 millimetres (7.9 in). The row of four sea-facing and two land-facing slabs reflects offshore wave by the action of the volume of water located under it which, made to oscillate under

2990-410: The great blue heron feeds in shallow waters, usually less than 50 cm (20 in) deep, or at the water's edge during both the night and the day, but especially around dawn and dusk. The most commonly employed hunting technique of the species is wading slowly with its long legs through shallow water and quickly spearing fish or frogs with its long, sharp bill. Although usually ponderous in movements,

3055-406: The great blue heron is adaptable in its fishing methods. Feeding behaviors variably have consisted of standing in one place, probing, pecking, walking at slow speeds, moving quickly, flying short distances and alighting, hovering over the water and picking up prey, diving headfirst into the water, alighting on water feet-first, jumping from perches feet-first, and swimming or floating on the surface of

3120-432: The great blue heron) has very similar plumage, but has a solidly soft-gray neck. Erroneously, the great blue heron is sometimes referred to as a "crane". Herons and cranes are easiest to differentiate in flight; cranes hold their necks straight when flying, but herons bend theirs into an S shape. The great blue heron is found throughout most of North America, as far north as Alaska and the southern Canadian provinces in

3185-438: The great egret ( Ardea alba ), but is larger, with yellow legs as opposed to the great egret's black legs. The reddish egret ( Egretta rufescens ) and little blue heron ( Egretta caerulea ) could be mistaken for the great blue heron, but are much smaller, and lack white on the head and yellow in the bill. At the southernmost extent of its range (e.g., Colombia and Panama ), the great blue heron sometimes overlaps in range with

3250-556: The help of breakwaters. Mobile harbours, such as the D-Day Mulberry harbours , were floated into position and acted as breakwaters. Some natural harbours, such as those in Plymouth Sound , Portland Harbour , and Cherbourg , have been enhanced or extended by breakwaters made of rock. Types of breakwaters include vertical wall breakwater, mound breakwater and mound with superstructure or composite breakwater. A breakwater structure

3315-548: The intensity of wave action in inshore waters and thereby provide safe harbourage. Breakwaters may also be small structures designed to protect a gently sloping beach to reduce coastal erosion ; they are placed 100–300 feet (30–90 m) offshore in relatively shallow water. An anchorage is only safe if ships anchored there are protected from the force of powerful waves by some large structure which they can shelter behind. Natural harbours are formed by such barriers as headlands or reefs . Artificial harbours can be created with

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3380-539: The latter predator, many eggs. In exceptional case, a young Harris's hawk ( Parabuteo unicinctus ) killed a subadult great blue heron. Adult herons have few natural predators and are rarely preyed upon due to their large size and sharp beak, but bald eagles ( Haliaeetus leucocephalus ) are known to attack great blue herons at every stage of their lifecycle from in the egg to adulthood. And less frequently, golden eagles ( Aquila chrysaetos ) and great horned owls ( Bubo virginianus ) are known to take adults. There

3445-430: The lower neck are long and plume-like; it also has plumes on the lower back at the start of the breeding season. The bill is dull yellowish, becoming orange briefly at the start of the breeding season, and the lower legs are gray, also becoming orangey at the start of the breeding season. Immature birds are duller in color, with a dull blackish-gray crown, and the flank pattern is only weakly defined; they have no plumes, and

3510-450: The material requirements—and hence costs—increase significantly. Caisson breakwaters typically have vertical sides and are usually erected where it is desirable to berth one or more vessels on the inner face of the breakwater. They use the mass of the caisson and the fill within it to resist the overturning forces applied by waves hitting them. They are relatively expensive to construct in shallow water, but in deeper sites they can offer

3575-623: The most exposed locations in very deep water, armour units are most often formed of concrete cubes, which have been used up to ~ 195 tonnes Archived 2019-05-12 at the Wayback Machine for the tip of the breakwater at Punta Langosteira near La Coruña, Spain. Preliminary design of armour unit size is often undertaken using the Hudson's equation , Van der Meer and more recently Van Gent et al.; these methods are all described in CIRIA 683 "The Rock Manual" and

3640-414: The name suggests, means the breakwater consists of one unbroken barrier, while multiple breakwaters (in numbers anywhere from two to twenty) are positioned with gaps in between (160–980 feet or 50–300 metres). The length of the gap is largely governed by the interacting wavelengths. Breakwaters may be either fixed or floating, and impermeable or permeable to allow sediment transfer shoreward of the structures,

3705-721: The nest is abandoned or destroyed, the female may lay a replacement clutch . Reproduction is negatively affected by human disturbance, particularly during the beginning of nesting. Repeated human intrusion into nesting areas often results in nest failure, with abandonment of eggs or chicks. However, Vancouver B.C. Canada's Stanley Park has had a healthy colony for some years right near its main entrance and tennis courts adjacent to English Bay and not far from Lost Lagoon. The park's colony has had as many as 183 nests. The female lays three to six pale blue eggs , which can measure from 50.7 to 76.5 mm (2.00 to 3.01 in) in length and 29 to 50.5 mm (1.14 to 1.99 in) in width, though

3770-535: The remainder of each day and the night, with eggs left without incubation for about 6 minutes of each hour. The first chick to hatch usually becomes more experienced in food handling and aggressive interactions with siblings, so it often grows more quickly than the other chicks. Both parents feed the young at the nest by regurgitating food. Parent birds have been shown to consume up to four times as much food when they are feeding young chicks (about 4300 kJ/day) than when laying or incubating eggs (about 1200 kJ/day). By

3835-617: The season. Many racing events are held in cooperation with the nearby Britannia Yacht Club (BYC) and Club de Voile Grande-Rivière (CVGR). Mondays typically see the women's racing. Tuesdays are PHRF. Wednesdays see 5o5s, Lasers racing one design, catamarans, and Albacores and Fireballs combining for handicap racing. Thursdays see C&C27s, Tanzer 22s, and Sharks race one design, J24s and Kirby 25s racing level, with three fleets of JAM (jib and main) racing PHRF . A distance race or regatta can be observed almost every weekend. The Nepean Sailing Club also maintains an active Able Sail program with

3900-472: The smallest eggs in the above sample may have been considered "runt eggs" too small to produce viable young. Egg weights range from 61 to 80 g (2.2 to 2.8 oz). One brood is raised each year. First broods are laid generally from March to April. Eggs are usually laid at two-day intervals, incubated around 27 days, and hatch asynchronously over a period of several days. Males incubate for about 10.5 hours of each day, while females usually incubate for

3965-635: The summer. In winter, the range extends south through Florida , Mexico , and the Caribbean to far northwestern South America (regular in Colombia and Venezuela, accidental elsewhere in South America). Birds east of the Rocky Mountains in the northern part of their range are migratory and winter in the coastal areas of the Southern United States , Central America, or northern South America. From

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4030-417: The time they are 45 days old, the young weigh 86% of the adult's mass. After about 55 days at the northern edge of the range (Alberta) and 80 days at the southern edge of the range (California), young herons take their first flight. They return to the nest to be fed for about another three weeks, following adults back from foraging grounds, and are likely to gradually disperse away from their original nest over

4095-594: The water. This species usually breeds in colonies , in trees close to lakes or other wetlands. Adults generally return to the colony site after winter from December (in warmer climes such as California and Florida) to March (in cooler areas such as Canada). Usually, colonies include only great blue herons, though sometimes they nest alongside other species of herons. These groups are called a heronry (a more specific term than " rookery "). The size of these colonies may be large, ranging between five and 500 nests per colony, with an average around 160 nests per colony. A heronry

4160-475: The women's PHRF racing and the skiffs and Lasers racing. Tuesdays are PHRF keelboats. Wednesdays see 5o5s, Lasers racing one design, catamarans, and Albacores and Fireballs combining for handicap racing. Thursdays see C&C27s, Tanzer 22s, Sharks, Mirage 24s race one design with three fleets of jib and main (JAM) racing PHRF. NSC has a racing program involving both ( PHRF and JAM fleets). NSC fields teams to compete against other clubs in team racing . BYC has

4225-412: Was long thought to be a separate species. Birds intermediate between the normal morph and the white morph are known as Würdemann's heron; these birds resemble a "normal" great blue with a white head. The theory that great white herons may be a separate species ( A. occidentalis ) from the great blue heron has again been given some support by David Sibley . The "great white heron" could be confused with

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