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Two constants that are found in nearly all insect wings are the claval (a flexion-line) and jugal folds (or fold line); forming variable and unsatisfactory boundaries. Wing foldings can be very complicated, with transverse folding occurring in the hindwings of Dermaptera and Coleoptera, and in some insects the anal area can be folded like a fan ...
The male is a glossy black-green with the wings, base of wings, and tail a glossy black-blue. [14] The tip of the tail is white. [15] The back of the head and the neck have elongated feathers that have been described as gray [16] or light purple-white. [14] The upper back of the body and wings are spotted or streaked with white. [16]
Border Security Force (Water/Marine Wing) is one of the special units of Border Security Force of India. It is responsible for patrolling riverine borders in North Bengal frontier, South Bengal frontier, Andaman Nicobar frontier, Tripura - Mizoram & Cachar (TMC) Frontier, Jammu frontier, Punjab frontier and Gujarat frontier of the BSF.
The wings are moved by the rapid muscular contraction and expansion of the thorax. [11] The wings arise from the meso- and meta-thoracic segments and are similar in size in the basal groups. In more derived groups, the meso-thoracic wings are larger with more powerful musculature at their bases and more rigid vein structures on the costal edge. [7]
Some water striders have wings present on the dorsal side of their thorax, while other species of Gerridae do not, particularly Halobates. Water striders experience wing length polymorphism that has affected their flight ability and evolved in a phylogenetic manner where populations are either long-winged, wing-dimorphic, or short-winged. [10]
According to a survey conducted online by The Harris Poll on behalf of PHTA, 66% of parents believe that floaties and water wings keep children safe in the water, despite the fact that these ...
Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.
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