Wild Republic's series of birds with sound includes these Songbirds. These include the Baltimore Oriole, Eastern Bluebird, Northern Cardinal, Western Meadowlark and more. At one time there were many other songbirds, but they have been retired. Wild Republic's Audubon Birds are 5 to 6 inches long and sing their own particular song when squeezed. They are made by Wild Republic in partnership with the Audubon Bird Society. The bird sound recordings are made by the Cornell Lab or Ornithology.