a) The double crested cormorant
The double crested cormorant is a specialist type bird. Its diet is mainly composed of sea fish and some times it feeds on small invertebrates of the sea as a supplement.
This bird species occupies hot and wet climates. They prefer these environments because they have very under developed oil glands and hence rely on the sun to dry its feathers which easily get soaked with water.
Their popular niche includes areas around rivers, swamps, lakes, coasts and bays. Their beaks are long and end with a small hook at the top. Its feet are curved/ webbed and this points out to its feeding habit (Rodgers 2004).
b) Great blue heron
The great blue heron is a populist. Its diet consists of small fish, crabs, aquatic insects, shrimps, rodents, small amphibians, reptiles as well as other small birds. They have a long beak which enable s them to hunt even in deep waters. When hunting in shallow waters it uses its beak and legs both of which are long to hunt in water by wading. They are very hardy birds and can survive both hot and cold temperatures; as a result they live in many habitats as long as there is plenty of food. Their oil glands on their skin are well developed and do not get soaked (Alsop 2002).
c) Wood stock
It is a large specialist bird. It feeds exclusively on small fishes especially Cray fish and tadpoles. They inhabit fresh water bodies because thy get their food by wading their long necks and beaks in water as they hunt for their food. Their oil glands are well developed and do not soak their feathers. They live close to swamp, ponds and lakes. They can survive in both cold and hot temperatures. (Terres 1987)
d) American robin
They are small birds and are populists. They feed n berries, insects, worms, and larva. They can live in wet and hot areas. They can be spotted on roadsides, forests, urban areas and ranchlands.
Reference list
Alsop F.J. (2002). Birds Of Texas, New York City: D.K. Publishing Inc,
Rodgers, M. (2004). The Report on Rare Birds In Great Britain In 2004. British Birds 98(12)657-693.
Terres, J.K.(1987). The Audubon Encyclopedia Of North American Birds: New York City: Knopf Publishers.
