ML647374227

影音備註

I'm curious about the 2 kHz low frequency whistle at 32 seconds, 40 seconds, 42 seconds and 1:03 and 1:07.

觀察細節

In the 1st recording, I'm particularly curious about the 2 kHz low frequency whistle at 32 seconds, 40 seconds, 42 seconds and 1:03 and 1:07?

其他鳥種

• European Starling Sturnus vulgaris
• Tufted Titmouse Baeolophus bicolor
• American Crow Corvus brachyrhynchos
• American Robin Turdus migratorius
• White-throated Sparrow Zonotrichia albicollis