Recently, a conjoined twin birds were found in Arkansas. This ultra rare find is a breakthrough in the bird world. It is so far the only case ever reported. There wasn't any conjoined incident in the bird world before, at least that's what we humans know.
The conjoined barn swallows first appeared to have only 3 legs. But it was later found that it's actually four, with the other one appearing shorter and hidden on the skin from the part connecting the two birds, making them look like only having 3. Scientist said this event is not even one in a million because it's probably more than that.
Read more: Conjoined Birds Of Arkansas [click]