Larger, with a longer tail than a rock pigeon; blue-gray on the upper parts with contrasting blackish gray flight feathers ... yellow with a black tip; and feet yellow. Adult female: like male ...

These two pigeon breeds -- the old Dutch capuchine, left, and komorner tumbler, right -- are not closely related, yet they both have feathery ornamentation on their heads known as a head crest.

They’re often raised as pets and showcased at international pigeon exhibitions and fairs, where their curly feathers make them stand out from the crowd. So if you ever see a bird that resembles ...

Juvenile: generally browner, lacks iridescence; orbital skin and feet gray. The rock pigeon was introduced from Europe by early settlers; it is now widespread and common throughout the United ...