Forkhead box protein P2 (FOXP2) is a protein that, in humans, is encoded by the FOXP2 gene. FOXP2 is a member of the forkhead box family of transcription factors, proteins that regulate gene expression by binding to DNA. It is expressed in the brain, heart, lungs and digestive system.
Foxp2 is expressed in the developing cerebellum and the hindbrain of the embryonic day 13.5 mouse. Allen Brain Atlases
Human FOXP2 gene and evolutionary conservation is shown in a multiple alignment (at bottom of figure) in this image from the UCSC Genome Browser. Note that conservation tends to cluster around coding regions (exons).
Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs are the bird sounds that are melodious to the human ear. In ornithology and birding, songs are distinguished by function from calls.
Bird vocalization
Wing feathers of a male club-winged manakin, with the modifications noted by P. L. Sclater in 1860 and discussed by Charles Darwin in 1871. The bird produces sound with its wings.
The Western Australian raven (Corvus coronoides, ssp. perplexus) makes a slow, high-pitched ah-ah-aaaah sound. Australian raven territorial callⓘ
A mated pair of white-naped cranes (Antigone vipio) performing a "unison call", which strengthens the pair bond and provides a territorial warning to other cranes
