The Pigeon tremex, Tremex columba, is a species of horntail

Horntail

Horntail or wood wasp is the common name for any of the 100 non-social species of the family Siricidae, of the order Hymenoptera, a type of xylophagous sawfly...

, native to Eastern and Western North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

. The females are larger than the males, with females growing to 25-30mm in length, and males about 20-25mm. The larvae feed on dead and dying trees such as beech

Beech

Beech is a genus of ten species of deciduous trees in the family Fagaceae, native to temperate Europe, Asia and North America.-Habit:...

, elm

Elm

Elms are deciduous and semi-deciduous trees comprising the genus Ulmus in the plant family Ulmaceae. The dozens of species are found in temperate and tropical-montane regions of North America and Eurasia, ranging southward into Indonesia. Elms are components of many kinds of natural forests...

, maple

Maple

Acer is a genus of trees or shrubs commonly known as maple.Maples are variously classified in a family of their own, the Aceraceae, or together with the Hippocastanaceae included in the family Sapindaceae. Modern classifications, including the Angiosperm Phylogeny Group system, favour inclusion in...

, and oak

Oak

An oak is a tree or shrub in the genus Quercus , of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus...

.

Megarhyssa macrurus

Megarhyssa macrurus

Megarhyssa macrurus , is a species of large ichneumon wasp.It is a predatory insect, notable for its extremely long ovipositor...

is the natural enemy of this species. It seeks out the larvae within the tunnels bored by this species. It then lays an egg next to the larva, which it then stings to paralyze it.