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Common Blackbird
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Common Blackbird 2024 Where Have All the Common Grackles Gone? National Audubon Society
New study upends common belief that birds escape winter to save energy Mongabay.com
How to Get Rid of Blackbirds and Grackles at Feeders Birds & Blooms
Migratory lifestyle carries no added overall energy cost in a partial migratory songbird Nature.com