Date: 8/19/25 3:13 am From: Fred Kaluza <fkaluza...> Subject: [birders] Yellow-Billed Cuckoos and Fighter Jets
A couple days ago I heard the very distinctive call of a Yellow-Billed Cuckoo nearby and it made me remember I’d heard this before in other places in Michigan but always at this time of year. I was not able to spot the bird and it’s call was too faint for Merlin (on my phone) or my Birdweather PUC to capture. Is August noted for post-fledge dispersal or are these birds engaged in some kind of migratory or pre-migratory or territorial establishment behavior at this time of year? Secondly, I’ve been outdoors enough lately to be treated to the Ruby-Throated air show. Just putzing around the yard while the Hummingbirds engage in aerial combat or warfare or mating when they come within a foot of my head and do whatever they do to make their feathers rattle. In all cases it seems one is pursuing another at high speed and it seems the sound produced is quite intentional. For modelers, I’m wondering what “scale speeds” they move at and how many “G” forces they subject themselves to?
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