Stick Insect

Stick insects (order Phasmatodea) include the longest known insects. The longest known is a currently undescribed species of Phryganistria, informally referred to as Phryganistria "chinensis", discovered in China in 2014. A wild collected female kept at the Insect Museum of West China in Chengdu had a total length, including extended legs, of 62.4 cm (24.6 in), and a body length of 36.1 cm (14.2 in), but it was surpassed by one of its captive bred young that reached 64 cm (25 in) in total length.

Other very large species include Phobaeticus chani (a specimen in the Natural History Museum in London is 56.7 cm (22.3 in) total length, body length 35.7 cm (14.1 in)), and females of the Australian Ctenomorpha gargantua (confirmed at up to 56.5 cm (22.2 in) total length; one captive individual measured 61.5 cm (24.2 in), but that size remains unconfirmed). Phobaeticus kirbyi reaches up to 54.6 cm (21.5 in) total length, body alone up to 32.8 cm (12.9 in).

Phobaeticus serratipes of Malaysia and Singapore measures up to 55.5 cm (21.9 in) total length. The spiny stick insect (Heteropteryx dilatata) of Southeast Asia does not reach extreme lengths (body up to 16 cm (6.3 in) long), but is much bulkier: the largest Heteropteryx weighed about 65 g (2.3 oz) and was 3.5 cm (1.4 in) wide across the thickest part of the body.