Abstract specialist. A generalist species can be able

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Last updated: September 21, 2019

AbstractBirds are classified as either generalist or specialist. A generalist species can be able to thrive I a wide range of environmental changes with a diet that varies with what the environment provides.

A specialist however only thrives in limited environmental conditions with a limited variety in their diet. A specialist finds it hard to survive in an environment that is not welcoming or suitable to the preset conditions they were used to. Classification to Generalist or Specialist CategoriesThe Double-crested Cormorant is a matte-black, prehistoric looking fishing bird with a yellow-orange facial skin. It is commonly found around fresh waters or salt-water bodies in North America. Its diet is mainly comprised of fish but sometimes indulges in a few insects.

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The bird is an expert at diving to capture small fish. It is able to dive into water and chase fish with the aid of its webbed feet. In looking for a suitable habitat, it often looks for water bodies to support its fish diet but sometimes settles for ponds going long distances to look for meals. The bird’s nest is often exposed to the sun while the adult protects the chicks and feeds them mouth-to-mouth. The bird is evenly distributed in the North American region.

In coastal Mexican region the bird does not migrate all year round. Populations in the continental interior and northern Atlantic Coast migrate to the southern and southeastern U.S.; western populations migrate to the Pacific Coast; Florida, coastal Pacific Northwest. The Double-crested Cormorant qualifies as a specialist bird.

The Great Blue Heron is famously known for its motionless stands while scanning for its prey. It belongs to the heron family Ardeidae commonly found along shores of water and in wetlands in North America, Central America, the Caribbean and the Galápagos Islands. Its neck structure aids it in striking its prey quickly and abruptly. The bird eats nearly anything within attacking distance comprising fish, small mammals, reptiles, amphibians insects and other birds.

It uses its strong mandibles to grab its prey or its dagger-like bills to pierce larger fish by shaking them before swallowing them down. When migrating, they move away from the northern edge of their breeding range in winter, with some flying south to the Caribbean while populations in the Pacific Northwest and south Florida are present throughout the year. The Great Blue Heron is a generalist bird. The Wood Stork is a large American bird belonging to the stork family Ciconiidae that is found in subtropical and tropical regions of America and Caribbean. It is the only stork breeding in the United States. It is quite tactful in feeding: feeding in shallow wetlands by concentrating on its prey in murky waters without depending on sight. It feeds on nothing else but fish.

It builds its nest in swampy ponds or lagoons. The bird does not migrate much but the Florida bunch move towards the eastern states with flocks of birds from eastern Mexico occurring along Texas coast in summer and those from western Mexico appear in summer at Salton Sea and in the southwest direction. The Wood Stork is a specialist bird.The American Robin is a very common species in North America.

It is nickname the ‘early bird’ commonly found in lawns tugging earthworms out of the ground. It is very popular for its cheery song, warm orange breast and early appearance at the end of winter. It indulges in a lot of fruits in fall and winter while also consuming insects during summer and spring. Female robins choose the nest sites, which are usually on trees. The bird does not migrate from south of Canada but those in the north pole of Alaska leave in fall for the U.S.

; some wintering as far as the Southwest, Mexico and the Gulf Coast. The American Robin is a generalist bird. 

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