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

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

National Moth Week was July 23-31, 2022! See moth submissions.

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 Mastigoproctus giganteus - Giant Vinegaroon

Huge Bug in my Living room! - Mastigoproctus giganteus Whip Scorpion Whipscorpion - Mastigoproctus giganteus Vinnie the Vinegaroon - Mastigoproctus giganteus Vinegaroon - Mastigoproctus giganteus Mastigoproctus giganteus Uropygi - Mastigoproctus giganteus Mastigoproctus giganteus ? - Mastigoproctus giganteus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Uropygi (Whipscorpions)
Family Thelyphonidae
Genus Mastigoproctus
Species giganteus (Giant Vinegaroon)
Other Common Names
Vinegarroon, Vinegaroon
Synonyms and other taxonomic changes
Mastigoproctus giganteus (Lucas)
Orig. Comb: Thelyphonus giganteus Lucas 1835
only whipscorpion n. of Mex.
up to 85 mm (>3")
AZ-TX-OK, FL / Mex - UF, 2011
July-Oct (BG data)
Carnivorous - preys on smaller creatures (insects, worms and slugs).
The vinegaroon is nocturnal and has poor vision. The whiplike tail is used as a sensory organ, as is the first pair of legs, which is not used for walking. Although its tail in unable to sting, this creature can spray an acidic mist from a scent gland at the base of the tail when disturbed. The spray is 85% concentrated acetic acid/vinegar, hence the common name "Vinegaroon." The heavy pinching mouthparts (modified pedipalps) can also inflict a painful bite. Although very unlikely to attack humans, it can certainly defend itself if provoked.
Internet References
Featured Creatures - W.H. Kern Jr. and R.E. Mitchell, UF, 2011 - diagram of bodyparts