Invertebrates are animals that don’t have or develop a vertebral column (commonly known as a backbone or spine). A few examples of invertebrates include insects, lobsters, snails, clams, octopuses, starfish, sea-urchins, jellyfish, and worms. The majority of animal species are invertebrates, up to 97%!

At Petrified Forest National Park, the most obvious invertebrates are arthropods, invertebrate animals that have an exoskeleton, segmented body, and paired jointed appendages. These include insects, spiders, and myriapods.

Tarantulas walking on the road
Tarantulas (Theraphosidae)

NPS/Andy Bridges

Monarch on milkweed
Monarch (Danaus plexippus)

NPS/Andy Bridges

Butterflies and Moths (Lepidoptera)
Omorgus beetle
Omorgus sp. beetle

NPS/Lauren Carter

Beetles (Coleoptera)
Harlequin Bug on the wall
Harlequin Bug (Murgantia histrionica)

NPS/Lauren Carter

True Bugs (Hemiptera)
Sun spider in defense
Sun spider (Solifugae)

NPS/Andy Bridges

Sun spider (Solifugae)
Bee fly
Bee fly (Exoprosopa sp)

NPS/Lauren Carter

Flies (Diptera)
Bluet Damselfly (Enallagma sp) sitting
Bluet Damselfly (Enallagma sp)

NPS/Andy Bridges

Dragonflies and Damselflies (Odonata)
Velvet ant on the ground
Velvet Ants (Mutillidae)

NPS/Andy Bridges

Wasps, bees, and ants (Hymenoptera)

Last updated: July 30, 2017

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Mailing Address:

1 Park Road, #2217
Petrified Forest, AZ 86028


(928) 524-6228

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