Schwarzkopfmeise / Black-capped chickadee (Poecile atricapillus)

Black-capped chickadee. 2023-10-13 14.45.40 New England
Systematik: Gattung Poecile; Familie Meisen (Paridae)
I was surprised to see that the chickadees I saw in Maryland are not the same ones as in New England: Carolina and black-capped.Wikipedia says they 'most likely diverged about 2.5 million years ago'!

Zuerst dokumentierte Beobachtung : 2023-10-13 in New England.