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Off! OFF! Unscented insect repellent. Off! (stylized as OFF!) is an insect repellent brand from American corporation S. C. Johnson & Son, produced in Finland. Its active ingredient is DEET ( N, N -diethyl- m -toluamide) or metofluthrin which is the most common ingredient in insect repellants. [ 1] It was first sold in 1957.
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Mosquitoes have a slender segmented body, one pair of wings, three pairs of long hair-like legs, and specialized, highly elongated, piercing-sucking mouthparts. All mosquitoes drink nectar from flowers; females of some species have in addition adapted to drink blood. The group diversified during the Cretaceous period.
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Insect physiology includes the physiology and biochemistry of insect organ systems. [ 1] Although diverse, insects are quite similar in overall design, internally and externally. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. The head comprises six fused segments with compound eyes, ocelli, antennae ...
Insect wing. Original veins and wing posture of a dragonfly. Hoverflies hovering to mate. A cockchafer 's hardened forewings raised, hindwings unfolding. Outstretched wing of a bumblebee. Insect wings are adult outgrowths of the insect exoskeleton that enable insects to fly. They are found on the second and third thoracic segments (the ...
Fleas are wingless insects, 1.5 to 3.3 millimetres ( 16 to 8 inch) long, that are agile, usually dark colored (for example, the reddish-brown of the cat flea ), with a proboscis, or stylet, adapted to feeding by piercing the skin and sucking their host's blood through their epipharynx.
Insect collecting refers to the collection of insects and other arthropods for scientific study or as a hobby. [ 1] Most insects are small and the majority cannot be identified without the examination of minute morphological characters, so entomologists often make and maintain insect collections. Very large collections are conserved in natural ...