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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 ...
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]
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 on the metathorax are transformed into the halteres or rocker arms. From this characteristic comes the name of the order, from the Greek dipteros , which means "two wings". In consequence of this morphological structure, the mesothorax represents the segment of greater development and complexity, while the prothorax and metathorax are ...
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 ...
The Boundary Waters is the largest wilderness area east of the Rocky Mountains. It spans more than 1 million acres along the U.S.-Canada border and is filled with forests, glacial lakes and streams.
Wings may have evolved from appendages on the sides of existing limbs, which already had nerves, joints, and muscles used for other purposes. These may initially have been used for sailing on water, or to slow the rate of descent when gliding. Two insect groups, the dragonflies and the mayflies, have flight muscles attached directly to the ...
Gymnosomes slowly beat their wing-like parapodia [2] in a rowing motion [9] to propel their "perfectly streamlined" [9] bodies through the upper 20 m of the water column. Although usually slow-moving, beating their wings once or twice per second, they are capable of bursts of speed when they need to pursue their prey, calling a separate suite ...