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Vaux's Swift: Small swift, gray-brown body, sometimes highlighted by slight green iridescence. Rump is pale brown, throat and breast are nearly white. Bill, legs, feet are gray-black. Flight is low and fast, alternates bursts of quick fluttery wing beats with short glides. Catches insects in flight.
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Von Schrenck's Bittern: Small heron, chestnut-brown above with black-chestnut on crown, and cream-buff on underparts and shoulder of wing. Medium, sharp black bill with yellow base on mandible. Fairly long, broad wings have black flight feathers. Female and juvenile have white marks on back and wings, chestnut and black streaks below.
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