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Halloween Creepers

Oct 27, 2019

It’s that spooky time of year where plastic bats and spiders hang in doorways and creep up walls. The real critters are not as scary as people think. They're beneficial in the natural circle of life and fascinating to watch.

Robber flies: These fierce predators have strength, speed, and deadly aim. Sometimes called assasin flies, these hairy hunters will pierce their prey, releasing enzymes in their saliva that quickly paralyze, then liquefy the insides. Robber flies suck up the fluids through their proboscis like a straw. Robber flies are found throughout the world with the exception of Antarctica. There are several hundred species in North America. They're often found in open fields, hunting during the hottest hours of the day. They eat many flying insects and can take down butterflies, dragonflies, and grasshoppers. Robber flies consume destructive pests that threaten agricultural crops. However, they do consume honeybees and other pollinators. A few even look like bumblebees. Robber flies do not attack humans but their bite can be very painful if you try to handle them.

Tarantulas: There are more than 50 species of tarantula's in North America but only one in Missouri. The Missouri tarantula, a stocky arachnid with eight hairy legs is the state's largest spider. Their huge size and fuzzy looks can give people the willy's but tarantula's are extremely shy and avoid people. Of course, you may want to jump out of your skin if you see one molting. Tarantula's shed their skin and even some internal organs from time to time.

Their bites are not normally serious with a pain like a honeybee sting. Tarantula's live in burrows in dry rocky glades where people are rare in the central and southern parts of the state. Tarantula’s are nocturnal and use the venom in their fangs to subdue and digest prey such as crickets. They don't make webs but will spin silk to line their burrows, wrap their eggs or create a tripwire to protect from enemies and interlopers.

For more on the Missouri tarantula, visit MDC's Field Guide.

Bats: There are 14 types of bats in Missouri. They’re the only mammals that can fly. Bats are clean, shy and smart. They consume mosquitoes and other insect pests that damage crops and forests. Bats use a type of sonar to capture insects and avoid obstacles in flight. Using this echolocation, bats emit an ultrasonic pitch higher than humans can hear and then listen for the sound waves to reflect back. From this they can calculate size, position, speed, and direction of objects and prey. They rest by hanging upside down and use gravity for a quick takeoff.

Many bats live in caves but they also find homes in hollow tree trunks, old barns and attics, anywhere there is a suitable nook or cranny. They are nocturnal and come out from twilight into nightfall to hunt for a few hours. Bats are some of the few mammals that people can actually watch in action. Look for them fluttering among the trees and rooftops as the stars are coming out. You can put up a bat house to bring in these insect-devouring mammals to your backyard and create your own natural neighborhood watch.

For more on bats, visit MDC's Field Guide.

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Silver-Haired Bat
Silver-Haired Bat
A silver-haired bat is held in a hands of wildlife biologist during a winter bat survey at Peck Ranch Conservation Area in Winona, Mo.

Creepy Critters

Tales of Creepy Critters
Tales of Creepy Critters

robberflyhalloween.jpg

Robber Fly attacks Halloween Pennant Dragonfly
Robber Fly attacks Halloween Pennant Dragonfly
Robber Fly Attacks Halloween Pennant Dragonfly

scorpion.jpg

striped scorpion
Striped Scorpion

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