Missing Syrinx Found! Mesozoic Vegavis vocalization verified
10,000 Birds,
One of the key features of birds, and I use the term “key” literally, is vocalization. Very few other vertebrates use sound so…
One of the key features of birds, and I use the term “key” literally, is vocalization. Very few other vertebrates use sound so…
Середина октября ассоциируется с перелё