Male Scarlet Tanagers are among the most blindingly gorgeous birds in an eastern forest in summer, with blood-red bodies set off by jet-black wings and tail. They’re also one of the most frustratingly hard to find as they stay high in the forest canopy singing rich, burry songs. The yellowish-green, dark-winged females can be even harder to spot until you key in on this bird’s chick-burr call note. In fall, males trade red feathers for yellow-green and the birds take off for northern South America.
Scarlet Tanagers often play host to eggs of the Brown-headed Cowbird, particularly where the forest habitat has been fragmented. When a pair of tanagers notices a female cowbird approaching, they aggressively drive her away. If they don’t notice, the cowbird gets rid of a tanager egg and replaces it with one of her own. The tanagers apparently can’t tell the difference, either before or after the egg hatches, and they raise the imposter along with the rest of their brood.
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