Comparison of Grey-cheeked and Bicknell's Thrush Songs
At first glance, Grey-cheeked and Bicknell's Thrush songs look remarkably similar. For the most part the final part, quite uniform across Bicknell's, is distinctively different. However some Grey-cheeked have endings very simialr to Bicknell's. See GC07.04 and GC11.06 for examples.
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GC07.04 |
GC11.06 |
Grey-cheeked
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BITH03.03 |
BITH01.02 |
Bicknell's
Bicknell's songs are typically longer, average 2.45 seconds versus 1.99 for Grey-cheeked. Grey-cheeked have many songs with the two note introductions so typical of Bicknell's songs, e.g., all of GC05. For the most part, Grey-cheeked do not sing a song type twice in succession, though they do occasionally.