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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 adult apple sawfly is up to 5 mm (0.2 in) long with a brownish-black head and thorax and a brown abdomen. The larva is a caterpillar-like grub with a brown head and white body, growing to about 10 mm (0.4 in) when fully developed. [2]
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.
Morphologically, most pergids are typically sawfly-like, but the form of the antennae varies considerably in number of segments and from simple to serrate and pectinate or even bipectinate. Sexual dimorphism is common and reflected in differences in type of antennae, colour, and size.
Cephoidea is a small superfamily within the Symphyta, commonly referred to as stem sawflies, containing some 100 species in 10 genera in the living family, Cephidae, plus another 17 genera in the extinct family Sepulcidae.
Cephus cinctus, also known as wheat stem sawfly, [1] is a slow flying, yellow and black coloured, destructive pest found mainly in western North America. [ 2 ] [ 3 ] Habit and habitat
Abia sericea can reach a length of 10–12 millimetres (0.39–0.47 in). [3] The adults have a large body with a showy metallic green-golden or bronze abdomen. The thorax is black, with bluish sheen and it is slightly hairy.
Macrophya punctumalbum can reach a length of 10 millimetres (0.4 in). [2] In the females the basic body color is black. Legs have bright, red hind femora, while tibias are black with white apex.