Red-eyed vireo

Rondeau Provincial Park, Ontario, Canada, Aug 27, 2021.


Expressing its displeasure with another intruder.

Vireo olivaceus
The Red-eyed Vireo's magnetic compass guides migration between continents. But fat stores seem to influence migration paths when the birds encounter the Gulf of Mexico. Fatter birds head across the Gulf, while leaner birds hug the coastline or travel inland around the Gulf. Cloud cover also makes routes near land more likely.
source- Cornell Lab of Ornithology.

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