Insect morphology least three different positions: prognathous, opisthognathous, and hypognathous. In species with prognathous articulation, the head is positioned vertically aligned with the body, such as species of Formicidae; while in a hypognathous type, the head is aligned horizontally adjacent to the body. An opisthognathous head is positioned diagonally, such as species of Blattodea and some Coleoptera. The mouthparts vary greatly between insects of different orders, but the two main functional groups are mandibulate and haustellate. Haustellate mouthparts are used for sucking liquids and can be further classified by the presence of stylets, which include piercing-sucking, sponging, and siphoning. The stylets are
National Insect Week entries from large numbers of amateur photographers. As well as promoting the importance of insect science to the wider public, National Insect Week particularly aims to encourage young people into entomology. Past National Insect Week campaigns have been endorsed by HRH The Prince of Wales, Prof David Bellamy OBE, Chris Packham, Kate Humble and Mike Dilger. The next National Insect Week will be 18-24 June, 2018. National Insect Week National Insect Week is a biennial initiative in the UK. Usually held during the last week of June, the aim is to engage the general public with the importance of insects