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The Peterson Field Guides (PFG) are a popular and influential series of American field guides intended to assist the layman in identification of birds, plants, insects and other natural phenomena. The series was created and edited by renowned ornithologist Roger Tory Peterson (1908–1996). His inaugural volume was the classic 1934 book A Field ...
Blackbird song. Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs are the bird sounds that are melodious to the human ear. In ornithology and birding, songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).
A blue variant of the print sold for $94,062.50 in Los Angeles in 2022. [3] Escher became interested in how forms could fit together to create what Sarah Lawson calls "paradoxical patterns", as when the black geese in Day and Night emerge from the darkened spaces between the white geese that are flying in the opposite direction. [4]
Diaper (cloth) Diaper is a damask cloth with small geometrical patterns such as bird's eye or diamond shapes. Terms such as “bird’s eye” or “pheasant’s eye” refer to the size of the diamond in the design. [1] Diaper has been used as a tablecloth.
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 the pieces of a jigsaw puzzle —in the middle, transitional portion of ...
Plumage (from Latin pluma 'feather') is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, there can be different colour morphs. The placement of feathers on a bird is not ...
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Common nighthawk. The common nighthawk or bullbat (Chordeiles minor) is a medium-sized [3][4] crepuscular or nocturnal bird [3][5] of the Americas within the nightjar (Caprimulgidae) family, whose presence and identity are best revealed by its vocalization. Typically dark [3] (gray, black and brown), [5] displaying cryptic colouration and ...