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A typical adult horntail is brown, blue, or black with yellow or red parts, and may often reach up to 4 cm (1.6 in) long. The pigeon horntail (Tremex columba) can grow up to 5 cm (2.0 in) long (not counting the ovipositor), among the longest of all Hymenoptera.
Megarhyssa nortoni is a predatory insect. Its larvae are parasitoids of horntail wasp larvae in coniferous trees. The adult female hunts horntail larvae for egg placement. It smells wood-eating fungus, utilized by the horntail larvae to predigest wood pulp, and uses its antennae to detect vibrations made by the horntail larvae.
Sirex noctilio, known as the European woodwasp, [1] European horntail woodwasp, [2] or sirex woodwasp, [note 1] is a species of horntail, native to Europe, Asia, and northern Africa. [ 3 ] [ 4 ] Adults vary in length from 9 to 36 mm ( 3 ⁄ 8 to 1 + 3 ⁄ 8 in).
Megarhyssa male adults reach body lengths going from 2.3 to 3.8 cm (0.9 to 1.6 inches), while female adults can measure from 3.5 to 7.5 cm (1.5 to 3 inches). [3] Both sexes can be distinguished because females have an extremely slender, and long organ to lay eggs called the ovipositor.
The giant woodwasp or horntail, Urocerus gigas, has a long ovipositor, which with its black and yellow colouration make it a good mimic of a hornet. Despite the alarming appearance, the insect cannot sting. [71] The eggs are laid in the wood of conifers such as Douglas fir, pine, spruce, and larch. The larvae eat tunnels in the wood, causing ...
Urocerus gigas, the giant woodwasp, banded horntail, or greater horntail, is a species of sawfly native to the Palearctic realm and North Africa but also reside in North America and Kelty since 2004. Though they are not wasps, their appearance resembles one due to mimicry . [ 1 ]
Urocerus albicornis (white-horned horntail) is a species of horntail native to North America. [1] [2] [3] [4] This species has occasionally been introduced into ...
Sirex cyaneus (blue horntail) is a species of horntail in the genus Sirex. Native to forests in Alberta, [1] they grow to 2 cm in length. [2] References