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1938. Type. woodcut. Dimensions. 43.5 cm × 43.9 cm (17.1 in × 17.3 in) Sky and Water I is a woodcut print by the Dutch artist M. C. Escher first printed in June 1938. The basis of this print is a regular division of the plane consisting of birds and fish. Both prints have the horizontal series of these elements —fitting into each other like ...
Wing clipping. Wing clipping is the process of trimming a bird's primary wing feathers or remiges so that it is not fully flight-capable, until it moults, sheds the cut feathers and grows new ones. This procedure is usually carried out by avian veterinarians, breeders, or the bird's owners, and primarily on pet birds like parrots.
A crab-eating macaque using a stone. Tool use by non-humans is a phenomenon in which a non-human animal uses any kind of tool in order to achieve a goal such as acquiring food and water, grooming, combat, defence, communication, recreation or construction. Originally thought to be a skill possessed only by humans, some tool use requires a ...
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Fishing techniques are methods for catching fish. The term may also be applied to methods for catching other aquatic animals such as molluscs ( shellfish, squid, octopus) and edible marine invertebrates . Fishing techniques include hand-gathering, spearfishing, netting, angling and trapping.
Longline fishing. Longline fishing, or longlining, is a commercial fishing angling technique that uses a long main line with baited hooks attached at intervals via short branch lines called snoods or gangions. [1] A snood is attached to the main line using a clip or swivel, with the hook at the other end. Longlines are classified mainly by ...
Rod (optical phenomenon) This long-exposure photograph of moths flying around a floodlight shows an exaggerated "rod" effect. In cryptozoology and ufology, " rods " (also known as " skyfish ", " air rods ", or " solar entities ") are elongated visual artifacts appearing in photographic images and video recordings.
Mourning dove. Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. Rock pigeon, Columba livia (I) Band-tailed pigeon, Patagioenas fasciata. Eurasian collared-dove, Streptopelia decaocto (I) Passenger pigeon, Ectopistes migratorius (E) Inca dove, Columbina inca.