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Sawfly and moth larvae form one third of the diet of nestling corn buntings (Emberiza calandra), with sawfly larvae being eaten more frequently on cool days. [52] Black grouse (Tetrao tetrix) chicks show a strong preference for sawfly larvae. [53] [54] Sawfly larvae formed 43% of the diet of chestnut-backed chickadees (Poecile rufescens). [48]
The larvae feed on plants (often conifers), using silk to build webs or tents, or to roll leaves into tubes in which they feed, thus earning them the common names leaf-rolling sawflies or web-spinning sawflies. Some species are gregarious and the larvae live in large groups. Fossils of Pamphiliidae have been dated to the Jurassic period. [1]
Lepidopteran caterpillars can be differentiated from sawfly larvae by: the numbers of pairs of pro-legs; sawfly larvae have 6 or more pairs while caterpillars have a maximum of 5 pairs. the number of stemmata (simple eyes); the sawfly larvae have only two, [7] while caterpillars usually have twelve (six each side of the head).
The iris sawfly (Rhadinoceraea micans) is a species of sawfly in the family Tenthredinidae. [2] Native to Europe, the larvae—more often noticed than the adults—can occur in large numbers causing damage to garden plants such as the yellow iris or flag, Iris pseudacorus .
The Pamphiliidae are the leaf-rolling or web-spinning sawflies such as Acantholyda, Neurotoma, and Pamphilius whose larvae eat plants such as conifers; the adults have simple filiform antennae. The Megalodontesidae include genera such as Megalodontes and several fossil groups.
Pristiphora erichsonii, the larch sawfly, is a species of sawfly. The adult sawfly resembles a black wasp, is about ½ inch in length with a thick waist and has brown to orangish markings on the abdomen. Larvae have black heads, gray-green bodies with white undersides, and are about 15–18 mm long when full grown.
Neodiprion lecontei is a species of sawfly in the family Diprionidae native to eastern North America, commonly known as the red-headed pine sawfly or Leconte's sawfly. The larvae feed on the foliage of many species of native and imported pines.
Tenthredopsis friesei, the common sawfly, is a species belonging to the family Tenthredinidae. Description Tenthredopsis friesei can reach a length of 10–11 millimetres (0.39–0.43 in) in males, of 9–12 millimetres (0.35–0.47 in) in females. Adults can be encountered from May through June feeding on nectar and pollen. The larvae feed on Holcus mollis. Distribution These sawflies are ...