• Evening Grosbeak Call Types of North America

    14 days ago - By All About Birds

    Evening Grosbeak Call Types of North America
    By Matt Young, Tim Spahr, and Andrew Spencer October 1, 2018
    Evening Grosbeak
    Evening Grosbeak Coccothraustes vespertinus
    © Christoph Moning
    Macaulay Library eBird
    The Evening Grosbeak is a fascinating finch: completely absent from most birders' visibility some years, and at every feeder in its range in others. Even more noteworthy is that, like Red Crossbills, Evening Grosbeak populations have different flight calls. We know from studies of Red Crossbills and the recent elevation of Type 9 Red Crossbill to Cassia Crossbill that these calls are...
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