Bird calls, on the other hand, are shorter ... Its song has been compared to a sped-up robin. Listen to the blackcap's song and discover more audio recordings of blackcaps on xeno-canto. With a short ...

He says the most difficult bird to emulate is the barn swallow, but he can imitate anything from a blue jay and a tufted titmouse to a robin. Since Henderson mostly practiced his calls alone on ...