Alex Hyde / Cave Cricket female (Troglophilus cavicola) on the side of stalactite in limestone cave. Plitvice Lakes National Park, Croatia. January.

Piotr Naskrecki / Amblypygid (Paraphrynus sp) feeding on Spider Cricket (Mayagryllus apterus) prey in cave, Belize

Emanuele Biggi / Carnivorous land snail (Oxychilus sp.) eating a cave cricket (Petaloptila andreinii), Italy

Emanuele Biggi / Carnivorous land snail (Oxychilus sp.) eating a cave cricket (Petaloptila andreinii), Italy

Emanuele Biggi / Carnivorous land snail (Oxychilus sp.) eating a cave cricket (Petaloptila andreinii), Italy

Emanuele Biggi / Carnivorous land snail (Oxychilus sp.) eating a cave cricket (Petaloptila andreinii), Italy

Emanuele Biggi / Cave centipede (Thereuopoda longicornis) with a cricket in its jaws, Gunung Mulu National Park, Borneo, Sarawak, Malaysia.

Emanuele Biggi / Cave cricket (Rhaphidophora sp.), Deer Cave, Gunung Mulu National Park, Borneo, Sarawak, Malaysia.

Emanuele Biggi / Cave cricket (Rhaphidophora sp.), Deer Cave, Gunung Mulu National Park, Borneo, Sarawak, Malaysia.

Michael Durham / Common Cave Cricket (Hadenoecus subterraneus) inside cave, Mammoth Cave National Park, Kentucky

Michael Durham / Common Cave Cricket (Hadenoecus subterraneus) inside cave, Mammoth Cave National Park, Kentucky

Alex Hyde / Spineless cave sphaeromatids (Monolistra racovitzai) scavenging on a dead Cave Cricket (Troglophilus cavicola). Slovenia, April.

Alex Hyde / Spineless cave sphaeromatids (Monolistra racovitzai) scavenging on a dead Cave Cricket (Troglophilus cavicola). Slovenia, April.

Alex Hyde / Cave cricket (Troglophilus cavicola) on wall of karstic cave. Slovenia, April.

Alex Hyde / Cave cricket male (Troglophilus cavicola) on the side of a stalactite in a limestone cave. Plitvice Lakes National Park, Croatia. November.

John Abbott / Cave Cricket (Mayagryllus apterus) Footprint Cave, Cayo District, Belize

John Abbott / Cave Cricket (Mayagryllus apterus) Footprint Cave, Cayo District, Belize

MYN / Emanuele Biggi / Cave cricket (Petaloptila andreini) subadult female, Busalla, Italy, February. Meetyourneighbours.net project

MYN / Emanuele Biggi / Cave cricket (Petaloptila andreini) subadult female, Busalla, Italy, February. Meetyourneighbours.net project

Piotr Naskrecki / Spotted Camel Cricket (Ceuthophilus maculatus), Woburn, Massachusetts

Piotr Naskrecki / Greenhouse Camel Cricket (Diestrammena asynamora) cleaning antenna, Woburn, Massachusetts

Piotr Naskrecki / Greenhouse Camel Cricket (Diestrammena asynamora), Woburn, Massachusetts

Piotr Naskrecki / Greenhouse Camel Cricket (Diestrammena asynamora), Woburn, Massachusetts

Piotr Naskrecki / Cedarberg Katydid (Cedarbergeniana imperfecta) is endemic to one of two small caves, Cederberg Wilderness Area, Western Cape, South Africa

Chien Lee / Cave Cricket (Rhaphidophora oophaga), Bukit Sarang Conservation Area, Bintulu, Borneo, Malaysia

Chien Lee / Cave Cricket (Diestrammena sp) pushing her ovipositor into the spongy surface of the limestone cave to lay eggs, Gunung Mulu National Park, Malaysia

Chien Lee / Cave Cricket (Rhaphidophora oophaga), Gunung Mulu National Park, Malaysia

Dietmar Nill / Cave cricket (Troglophilus neglectus) Europe

Juergen Freund / Orthopteran insect inside a cave in Caramoan, Camarines Sur, Luzon, Philippines

Juergen Freund / Orthopteran insect inside a cave in Caramoan, Camarines Sur, Luzon, Philippines

Juergen Freund / Orthopteran insect inside a cave in Caramoan, Camarines Sur, Luzon, Philippines

Piotr Naskrecki / Cedarberg Katydid (Cedarbergeniana imperfecta) trio, are endemic to one of two small caves, Cederberg Wilderness Area, Western Cape, South Africa

Piotr Naskrecki / Cedarberg Katydid (Cedarbergeniana imperfecta) is endemic to one of two small caves, Cederberg Wilderness Area, Western Cape, South Africa

Kerstin Hinze / Cave cricket (Troglophilus cavicola) female in a cave, Carinthia, Austria

Kerstin Hinze / Cave cricket (Troglophilus cavicola) female in a cave, Carinthia, Austria

Piotr Naskrecki / Amblypygid (Paraphrynus sp) feeding on Spider Cricket (Mayagryllus apterus) prey in cave, Belize

Piotr Naskrecki / Cedarberg Katydid (Cedarbergeniana imperfecta) is endemic to one of two small caves, Cederberg Wilderness Area, Western Cape, South Africa

Mark Moffett / Cave Weta (Gymnoplectron edwardsii) in cave, Wellington, New Zealand

Claudio Contreras / Blind cave cricket (Tachycines sp.) inside cave. El Cielo Biosphere Reserve, Mexico.