Birds. In Case You’ve Never Seen a Bird…. Some Examples include: Owls Ostriches Flamingos Eagles Penguins Robins Pigeons Vultures. Birds Are…. Endothermic – they generate and maintain heat Eat more food than ectotherms Insulated by feathers. External Anatomy. Coverings/Defense
at birth, require care
at birth, usually born
on the ground
Aside from feathers, which are completely unique to birds, birds have structures that show close relation to other species.
Known as brood parasitism, cuckoos lay their eggs in other birds nests in order to relieve themselves of the burden of raising their young. However, even though the cuckoo hatchlings are raised by surrogate parents, they still behave like their biological parents, the cuckoos.
This increases the fitness of the population because the parents can keep reproducing without having to worry about caring for their young, and they won’t have to worry about their species dying out.
Known as imprinting, immediately after ducks and geese are born they establish a connection with the species they see first. Typically, their duck parents are who they see first, so they imprint on ducks, and they know they are a duck. However, if they see humans first, they will imprint on humans, and think they are a human.
Ducks and geese also imprint on with whom they are raised, their siblings. Even though they may have imprinted on humans once they were born, if they are raised with their duck siblings, they will imprint on the ducks, and then think they are ducks.
This can be a danger to the fitness of the population because if ducks are born and raised with another species they won’t reproduce with their own species.