The grasshopper's nervous system is controlled by ganglia, loose groups of nerve cells that are found in most species more advanced than cnidarians.
Diurnal activity is prevalent in the short-horned grasshoppers, when they feed and mate, with nighttime activities including molting and egg laying (Grizmek et al.
Grasshoppers develop through stages, progressively getting larger in body and wing size (incomplete metamorphosis).
The Tettigoniidae (long-horned grasshoppers) are typified by antennae longer than the body, while the Acrididae (short-horned grasshoppers) have antennae shorter than the body.
Members of the family Tettigoniidae are commonly known as bush crickets or katydids, and are closely related to the crickets, which are also members of Ensifera, but are not included with the grasshoppers.
During reproduction, the male grasshopper introduces sperm into the vagina through its aedeagus (reproductive organ), and inserts its spermatophore, a package containing the sperm, into the female's ovipositor.
The true grasshoppers produce sounds by rubbing their legs against the abdomen, and there may also be a visual display.
Members of the suborder Caelifera, including therein the family Acrididae, are as a group sometimes called short-horned grasshoppers, in which case members of the suborder Ensifera are called long-horned grasshoppers (Grzimek et al.
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The grasshopper's reproductive system consists of the gonads, the ducts which carry sexual products to the exterior, and accessory glands.
Tettigoniids may be distinguished from true grasshoppers by the length of their antennae, which may exceed their own body length, while in Acrididae are always relatively short.
Sound production is one of the main characteristics associated with grasshoppers; it is used to attract mates, defend territory, and warn about predators (Grizmek et al.
Grasshoppers have open circulatory systems, with most of the body fluid (hemolymph) filling body cavities and appendages.
Raw grasshoppers should be eaten with caution, as they can contain tapeworms.
Grasshoppers also have tympanal organs for sound reception.
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Grasshoppers are long and slender insects belonging to the order Orthoptera, typically exhibiting long, strong hind limbs for leaping and powerful mouth-parts for chewing.