are all the 12 days of christmas birds

Yes, the Twelve Days of Christmas is a song that lists twelve different gifts given by a suitor to his beloved, with each gift being a type of bird. So, all the gifts in the song are birds, including the partridge, turtle doves, French hens, calling birds, golden rings, geese-a-laying, swans-a-swimming, maids-a-milking, ladies dancing, pipers piping, and drummers drumming.