I’m talking about the ones that stay in north during winter, not migratory birds. I’ve noticed that birds like sparrows or tits (yes yes i know funny name) look more rotund in fall, but is that actually fatness or just them fluffing up?
I’m talking about the ones that stay in north during winter, not migratory birds. I’ve noticed that birds like sparrows or tits (yes yes i know funny name) look more rotund in fall, but is that actually fatness or just them fluffing up?
Mostly puffing up their feathers. On warm days they are suddenly smaller again.
I believe this is scientifically referred to as temporary borbitude.
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