M Molvray & P Kores: Photos of Wildflowers, Nature, and Biology

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crows-in-winter-display-flock-flying-2014-07-20-IMG 4149

crows-in-winter-display-flock-flying-2014-07-20-IMG_4149.jpg giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016giant-swallowtail-butterfly-Papilio-cresphontes-at-hummingbird-feeder-2015-07-06-IMG 1026ThumbnailsPolytrichum-showing-epiphragm-taken-with-iphone-through-handlens-2014-07-IMG 0016

When not in breeding season, crows sometimes gather in flocks of hundreds of birds.