Interested in the contents of the rucksack

Interested in the contents of the rucksack

A juvenile of Screaming Cowbird on top and a Bay-winged Cowbird, below. The Screaming Cowbird parasitizes almost exclusively the Bay-winged Cowbird. The juveniles of these two species are quite alike till the Screaming Cowbird acquires black spots. On the wing the typical brown coloruing of the greyish baywing can be seen.

A juvenile of Screaming Cowbird on top and a Bay-winged Cowbird, below. The Screaming Cowbird parasitizes almost exclusively the Bay-winged Cowbird. The juveniles of these two species are quite alike till the Screaming Cowbird acquires black spots. On the wing the typical brown coloruing of the greyish baywing can be seen.

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