Tree wētā (Hemideina) are the most commonly encountered wētā in suburban settings in the North Island. They are up to 40 mm long and most commonly live in holes in trees formed by beetle and moth larvae or where rot has set in after a twig has broken off. The hole, called a gallery, is maintained by the wētā and any growth of the bark surrounding the opening is chewed away.
There are seven species of tree wētā:
*Alternatively, possible tree wētā species could be worked out through the location guide below. However in certain localities, 2 or more tree weta species co-occur and in that case, the above key has to be used in combination with the location guide.