Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA
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Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA
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Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA
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John Abbott / European hornet (Vespa crabro germana), Tuscaloosa County, Alabama, USA September
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John Abbott / European hornet (Vespa crabro germana) on white background, Tuscaloosa County, Alabama, USA September
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John Abbott / European hornet (Vespa crabro germana) on white background, Tuscaloosa County, Alabama, USA September
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John Abbott / European hornet (Vespa crabro germana) flying, Tuscaloosa County, Alabama, USA Controlled conditions. September
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Doug Wechsler / European hornet (Vespa crabro) queen hibernating, Fairmount Park, Philadelphia, Pennsylvania, USA, December.
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Doug Wechsler / Bald-faced hornets (Dolichovespula maculata) around alcoholic flux, a stress related disease that causes foam like sap to bleed from wounds in the bark, Washington State Park, Pennsylvania, USA, July.
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John Abbott / Baldfaced Hornet (Dolichovespula maculata) Junipers Reservoir, Lake View, Lake County, Oregon, USA, June.
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Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) hibernating inside a log, Montgomery County, Pennsylvania, USA. November.
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Doug Wechsler / Bald-face hornet (Dolichovespula maculata) drinking fermented sap (alcohol flux) from tree bark, Montgomery County, Pennsylvania, USA. September.