A quick observational browse through last night's recording data results in
these highlights:
4 Black-billed Cuckoos
2 Hooded Warblers
1 Black-and-white Warbler
2 Lincoln's/Swamp Sparrows
Nothing really Earth-shattering as far as rarity, but it was definitely an
active night.
Recently, I've be
"What is the theory for decreased contact/NFC calls as the night wears on?"
I thought one hypothesis(?) was that in the middle of the night the birds
are actually too high to be able to hear?
Has anyone ever tested empirically what elevation birds migrate at? I
would think this would be relativ
