Nucifraga columbiana (Wilson, 1811) - Clark's nutcracker at Rainbow Curve overlook in Rocky Mountains National Park, Colorado, USA. (photo by Mary Ellen St. John) Jays, crows, and ravens (Family Corvidae) have the largest body sizes of any passerine bird group in the world. Corvid passerine birds are omnivorous, aggressive, usually gregarious, have harsh calls, powerful beaks, and limited to no sexual dimorphism. These birds typically have bristles covering the nostrils along the upper proximal portions of the beak. Clark's nutcrackers have a white face, gray body, black wings & center part of tail with white at the edges & underneath. They are common around picnic grounds in western America, where they "mooch" for food, which isn't really good for them. Their natural food is pine seeds, cedar berries, and insects. Classification: Animalia, Chordata, Vertebrata, Aves, Passeriformes, Corvidae Birds are small to large, warm-blooded, egg-laying, feathered, bipedal vertebrates capable of powered flight (although some are secondarily flightless). Many scientists characterize birds as dinosaurs, but this is consequence of the physical structure of evolutionary diagrams. Birds aren’t dinosaurs. They’re birds. The logic & rationale that some use to justify statements such as “birds are dinosaurs” is the same logic & rationale that results in saying “vertebrates are echinoderms”. Well, no one says the latter. No one should say the former, either. However, birds are evolutionarily derived from theropod dinosaurs. Birds first appeared in the Triassic or Jurassic, depending on which avian paleontologist you ask. They inhabit a wide variety of terrestrial and surface marine environments, and exhibit considerable variation in behaviors and diets.
Summary[edit] Description: Nucifraga columbiana (Wilson, 1811), Clark's Nutcracker, Rocky Mountain National Park, Colorado, USA, 21 September 2016. Date: 21 September 2016, 21:21. Source: Nucifraga columbiana. Author: Donald Hobern from Copenhagen, Denmark. Camera location40° 24′ 01.52″ N, 105° 39′ 47.54″ WView all coordinates using: OpenStreetMap 40.400422; -105.663206.
Summary[edit] Description: English: Nucifraga caryocatactes Oulu, Finland 2020-09-15. Date: 15 September 2020, 14:12:28. Source: Own work. Author: Matti Virtala.
Summary[edit] Description: 日本語: ホシガラス、飛騨山脈の乗鞍岳、長野県松本市にて English: Nucifraga caryocatactes in Mount Norikura, Hida Mountains, Matsumoto, Nagano Prefecture, Japan. Canon EOS Kiss X9. Date: 18 September 2018, 13:26:03. Source: Own work. Author: Alpsdake.