Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

See Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Cyphoderris monstrosa - Great Grig

Uhler's Hump-winged Cricket - Cyphoderris monstrosa - female mutant bug! what is it?! - Cyphoderris monstrosa Male Cyphoderris Monstrosa - Cyphoderris monstrosa - male Parasitized by a horsehair worm/Nematomorpha - Cyphoderris monstrosa curiosity peaked - Cyphoderris monstrosa Cyphoderris monstrosa - male Cyphoderris monstrosa - female Cyphoderris monstrosa male genitalia - Cyphoderris monstrosa - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Orthoptera (Grasshoppers, Crickets, Katydids)
Suborder Ensifera (Long-horned Orthoptera)
Infraorder Tettigoniidea (Katydids, Camel Crickets, and relatives)
Family Prophalangopsidae (Hump-winged Crickets)
Genus Cyphoderris
Species monstrosa (Great Grig)
Other Common Names
Monster Haglid
Explanation of Names
MONSTROSA: like a monster; very large and abnormally shaped or hideous (this species is the largest of the 3 in North America)
one of three species in this genus in North America; uncommon in appropriate habitat
body length 20-30 mm
male dark gray dorsally, pale whitish ventrally, with short wings humped up and wrinkled like a loosely-folded blanked heaped on the insect's back; male subgenital plate with a ventrally-directed process shaped like the nail-pulling claw of a hammer
female either lacks wings or has them reduced to small stubs
southern British Columbia and Alberta, south to northern California and southern Idaho (see distribution map)
coniferous forests containing Lodgepole Pine, Englemann Spruce, and Mountain Hemlock; adults hide beneath leaf litter during the day, and become active at night, climbing tree trunks and continuing high into the branches to feed, sing (males), and mate
adults from June to August
staminate flowers of coniferous trees, and flower parts & pollen of broadleaved shrubs; sometimes eats fruit and small insects
Life Cycle
overwinters as a late-instar nymph or young adult in burrow in ground; one generation per year
males stridulate to attract females or to announce territory; males also have fierce fights over territory and/or females
See Also
compare C. buckelli (whose male lacks a ventrally-directed process on the subgenital plate), and C. strepitans (which doesn't occur in Canada)