Enables DNA-binding transcription repressor activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and identical protein binding activity. Involved in cerebellar Purkinje cell differentiation; gene expression; and vocalization behavior. Acts upstream of or within several processes, including animal organ development; positive regulation of cell population proliferation; and righting reflex. Is active in nucleus. Is expressed in several structures, including alimentary system; brain; genitourinary system; musculoskeletal system; and respiratory system. Human ortholog(s) of this gene implicated in several diseases, including attention deficit hyperactivity disorder; autism spectrum disorder (multiple); communication disorder (multiple); dyslexia; and major depressive disorder. Orthologous to human FOXP2 (forkhead box P2). [provided by Alliance of Genome Resources, Apr 2022]