Male rose-breasted grosbeak



Rondeau Provincial Park, June 6, 2023.
Shortage of new birds, so here is a regular visitor to the yard.
Pheucticus ludovicianus.
Researchers used mounted specimens of male Rose-breasted Grosbeaks to explore aggressive behavior. Live male birds attacked the white rump and flanks of the models, suggesting that the white markings are more important than the red chest in stimulating aggression.

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