The double-crested cormorant is a large waterbird with a stocky body, long neck, medium-sized tail, webbed feet, and a medium-sized hooked bill. Sitting on the dock beside our pontoon boat. Forages mostly by diving from surface and swimming underwater, propelled by feet (may sometimes use wings as well). Male displays to female on water by splashing with wings, swimming in zigzags, diving and bringing up pieces of weeds. Coasts, bays, lakes, rivers. Photo: Xianwei Zeng/Audubon Photography Awards. Double-crested cormorants are protected under the Migratory Bird Treaty Act. Birds dive, swim, and wade—and so can you with the proper gear. At nest site, male displays by crouching and vibrating wings while calling. 3-4, sometimes 1-7. Nest: Site is near water on cliff ledge, on ground on island, or at any height in tree. Nests in colonies, sometimes mixed with wading birds and others. Photo: Howard Arndt/Audubon Photography Awards, Great Egret. In some regions, wildlife management agencies have culled some nesting populations because of concerns that they birds would crowd out other colonial waterbirds. Given the allowable take provided for in the assessment, the Service is implementing a number of steps to make sure we do not exceed the allowable take including prioritizing the take based on the type of damages when allocating take: (1) human health and safety, (2) aquaculture, (3) federally listed threatened and endangered species, and (4) property. The birds are opportunistic and generalist feeders, preying on many species of fish, but concentrating on those that are easiest to catch. Numbers dropped again through 1960s, probably owing to effects of persistent pesticides. The double-crested cormorant is the slim black bird we often see swimming in the waters or resting on the shoreline around Alameda. Spread the word. Fish and Wildlife Service (Service) prepares an adequate Environmental Assessment (EA) or Environmental Impact Statement (EIS) in compliance with the requirements of the National Environmental Policy Act (NEPA). Females lay two to seven eggs. The Double-crested (which rarely looks noticeably crested in the field) is the most generally distributed cormorant in North America, and the only one likely to be seen inland in most areas. Recovery and Interstate Commerce Choose a temperature scenario below to see which threats will affect this species as warming increases. Usually first fly at about 5-6 weeks, probably independent at 9-10 weeks. They fly low over water, their bill tilted upward slightly, sometimes flying out from the colony in a long, single-file line. When exiting the water, they tip-toe, moving both legs together in a hopping fashion, launching themselves forward and pumping their wings to gain momentum. Are the Trump Administration's Environmental Rollbacks Built to Last? Help power unparalleled conservation work for birds across the Americas, Stay informed on important news about birds and their habitats, Receive reduced or free admission across our network of centers and sanctuaries, Access a free guide of more than 800 species of North American birds, Discover the impacts of climate change on birds and their habitats, Learn more about the birds you love through audio clips, stunning photography, and in-depth text. The bird is about three feet long with a wingspan of more than four feet. Let us send you the latest in bird and conservation news. You also may look up a Wildlife Services state office online. primary habitats, Cache River National Wildlife Refuge adds lands for wildlife conservation, New for 2016-17, all permit sales will be conducted online, Four Southeastern species do not require federal protection, two others under further review, Visit the reading room to search for documents. 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