what birds are in the 12 days of christmas

In the Christmas carol "The Twelve Days of Christmas," the 12 days refer to the 12 days of Christmas leading up to Christmas Day. The gifts in the song are generally considered to be 12 days of Christmas, not 12 different gifts. However, if you were to add up all the birds, there are 47 birds mentioned in the song. This is counting the "Partridge in a Pear Tree" as one bird and the two birds of each subsequent verse (two turtle doves, three French hens, etc.) as separate birds.