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The scales and scutes of birds were thought to be homologous to those of reptiles, [4] but are now agreed to have evolved independently, being degenerate feathers. [ 5 ] [ 6 ] Carcharodontosaurid theropod dinosaur Concavenator , is known to have possessed these feather-derived tarsal scutes.
There is a theory that it comes from the World War II RAF acronym GISS for "General Impression of Size and Shape (of an aircraft)", [11] but the use of the term in 1922 precludes that. [7] [12] Another theory is that jizz is a corruption of gestalt, a German word that roughly means form or shape. [13]
This project's scope also includes zoologists and zoology-related articles. Goals: Create and maintain articles about animals to an encyclopedic standard. Describe all families, genera and species of the kingdom Animalia. Maintain Category:Animals and its subcategories. Assess and rate articles under the scope of Wikiproject Animals.
Birds (class Aves) – winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most varied of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic, to the Antarctic.
The shapes of hummingbird beaks (also called bills) vary widely as an adaptation for specialized feeding, [65] [66] with some 7000 flowering plants pollinated by hummingbird nectar feeding. [194] Hummingbird beak lengths range from about 6 millimetres (0.24 in) to as long as 110 millimetres (4.3 in). [195]
The bird has an all-black appearance with a rich gloss to its feathers of purple, dark blue and some green in good light. The beak , feet and legs are all black. The beak is moderate in size but is unusual in that the tip of the lower mandible is angled upwards, making it somewhat chisel-like in profile.
There are 107 classes of animals in 33 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by no means be considered complete and authoritative and should be used carefully.
Bird netting or anti-bird netting is a form of bird pest control. It is a net used to prevent birds from reaching certain areas. Bird protection netting comes in a variety of shapes and forms, The most common is a small mesh (1 or 2 cm squares) either extruded and bi-oriented polypropylene or woven polyethylene.
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