The Top 5 Scary Animals (That Aren’t Really That Scary)

By Garrett Genereux, Intern Naturalist

Assassin Bug

An assassin bug having a bee for lunch! Photo credit Dave Wilson Photography.

During this spooky time of year it is popular to post lists of scary things. Often times these lists feature animals such as the Great White shark or the Grizzly bear – animals that are actually quite frightening when encountered in nature. The five animals I am going to write about are “scary” but they will not get your instinctual-adrenaline pumping. These animals either appear scary or have some type of behavior that is scary, but in reality they pose little threat to us humans.

5. Assassin Bugs

These small (less than 40 mm) insects from the order Hemiptera (true bugs) are real-life vampires. Like their name suggests, they are highly-skilled predators. Assassin bugs employ camouflage coloring, dust, and sometimes even the exoskeletons of previous victims to hide and wait for their prey. They have also been known attack while flying. Once they have caught their prey, they use their straw-like mouth, called a rostrum, to inject saliva into their victim’s body. This isn’t just ordinary saliva; this saliva dissolves the inner tissues of their prey into liquid which the assassin bug then sucks out through the rostrum. There are 7,000 species worldwide. The Assassin bugs that can commonly be found in the prairie here at River Bend are quite benign. However, there are several species that inhabit parts of Central and South America that do feed on the blood of humans while they are sleeping. A few specific species of these blood-sucking Assassin bugs carry Chagas disease which can be fatal.

Wrinkle Faced Bat

It is hard to forget a face like that! Photo credit Evets Lembek.

4. Wrinkle-faced Bat

This fruit-eating bat truly has a face that only a mother could love. Wrinkle-faced bats can be found in several Central and South American countries. The face of the male bat typically has more wrinkles than the female. These skin growths are thought to help direct sound waves to their ears. Also quite strange is that the male bats have a flap of skin on their neck that they can tuck their whole head into. Very interesting to note is that the wrinkle-faced bat’s head is wider than it is tall. This adaptation allows the bat to increase the strength of its bite. Some scientists have conjectured that this allows the Wrinkle-faced bat to eat tough-skinned fruit when soft fruit is not available.

Tailless Whip Scorpion

Just remember it can’t hurt you! Photo credit Brujo.

3. Tailless Whip Scorpion

Although not a scorpion, this arachnid is perhaps more visually startling than its relative. Besides its six walking legs and two pedipalps (the two claw/pincer type legs near the animal’s mouth) it has a long appendage on each side of its body which is the “whip”. These appendages are not actually used as whips, but they do help catch prey. Typically the Tailless Whip scorpion walks sideways with its whips probing in front and behind as it walks feeling around for prey. Once it finds its prey it catches it with the pedipalps which have thornish spikes to ensure the prey does not get away. These arachnids do not have spinnerets or venom. There are 155 species that live in tropical and sub-tropical areas (so nothing to fear here in Minnesota). These animals prefer a humid environment.

Pistol Shrimp

For being so small it sure packs a punch! Photo credit Debby Ng.

2. Pistol Shrimp

Yes, a diminutive, plain-looking shrimp is at number two on this list. So if it doesn’t look frightening, then why is it on this list? Because it can do something quite spectacular that makes me thankful that it is fairly small and lives on the ocean floor far away from here.  The Pistol shrimp, also known as the Snapping shrimp, is a predatory shrimp and has a very unique way of catching its prey. The shrimp has asymmetrical claws, with one of the claws being able to produce very loud (190 decibels) snapping noise that it uses to catch prey and communicate. When there are great populations of these shrimp they can actually disrupt sonar and cause noise pollution in the ocean due to their incredibly loud snapping. Now to the interesting part, how they catch their prey. Typically they feed on small fish and other shrimp. They lay in wait until they sense movement with their antennae. Then they cock back their snapping claw and aim it at their prey. Next it releases the claw (hence the pistol name) and it creates a cavitation bubble (the loud snapping noise creates a pressure difference in the water) which travels towards the prey at upwards of 100 km/hr and at a temperature of 9000 ⁰C. Yes you read that correctly. Nine. Thousand. Degrees. Celsius. And yes, that is hotter than the surface of the sun. This cavitation bubble eventually implodes, effectively and severely stunning the prey which allows the Pistol shrimp to grab it and bring it back to its burrow to feed. This shrimp lives in oceans worldwide.

House Centipede

So terrifying!!! Photo credit AussieBotanist.

1. House Centipede

This centipede is only five centimeters long, which is dramatically smaller than its largest cousin, the Amazonian Giant centipede, which can be up to 35 centimeters long.  However, this centipede can be commonly found in your house, it moves uncommonly fast, and is not pleasant to look at. It may be of consolation that if this centipede is found in your house, it means that it is getting rid of other pests including ants, silverfish, small spiders, and even bed bugs. To catch this prey it moves very fast- up to .5 meters per second. Like many other centipedes, the house centipede uses venom to kill its prey. This species has specialized legs near its mouth that inject the venom instead of using mouthparts. House centipedes have been observed jumping onto their prey, lassoing them with their legs, and even bludgeoning their prey with their legs. Another adaptation that makes this centipede a great hunter is that it has highly developed eyes which are unusual among centipedes, although it still uses its antennae quite a bit. If you are quick enough to squash this arthropod, you better be accurate. House centipedes are notorious for being able to drop appendages that are trapped. However, if you squash too hard the centipede may drop all of its legs and essentially explodes. Originally from the Mediterranean, the House centipede is found almost worldwide. Just hope that the next time you move a piece of furniture you don’t see this creepy crawler speed away to its next hiding spot.

I hope that these animals did not scare you too much. Just remember that most of them don’t live here in Minnesota and that you as a human are much larger than they are so in reality they are probably more scared of you than you are of them. Enjoy Halloween!

Garrett Genereux is an intern naturalist for the River Bend Nature Center, a member supported non-profit dedicated to helping people discover, enjoy, understand and preserve the incredible natural world that surrounds us. Contact us at rbncinfo@rbnc.org or 507-332-7151.

Five Fun Fall Things to do at River Bend

By Jill Engle, Marketing & Communications Coordinator

Broad-winged hawk

A broad-winged hawk is easier to spot once the trees drop their leaves.

Now that the temperatures have started to get frosty and the landscape’s palette has turned to shades of brown and tan and is no longer orange, red, yellow, and green, it must be time for me to admit that the fall season is here. While some of us may start to have that animal instinct to hide away in our homes hibernating until the warm weather returns (me!), we should resist our instincts by zipping up our polar fleeces, reminding ourselves that in spring this will be shorts and flip-flop weather, and heading out to enjoy some of the autumn activities that nature and River Bend have to offer.  So here it is, my top five list of fun fall things to do at River Bend Nature Center.

Dark-eyed Junco

Dark-eyed juncos are “snow birds” that overwinter in Minnesota.

5.  Wildlife Walk: The majority of River Bend’s trees have dropped their leaves and that makes this a perfect time of year to take a wildlife-spotting walk in the woods. Owls, hawks, and other birds of prey are easier to spy high in the barren tree branches than when they were camouflaged in summer leaves. Salamanders are a common sight this time of year as they move away from their summer habitats in search of safe spots to hibernate this

Salamander

Salamanders are a common sight this time of year as they search for safe spots to hibernate.

winter. Keep an eye out for flocks of smaller birds who are preparing to migrate; groups of robins are around and many sparrow species are stopping by feeders on their way south. Just so we don’t feel abandoned, the dark-eyed juncos have returned to our area for the winter, we’re “south” for them! Go figure.

4.  Fossil Hunt: With recent lack of rain now is a great time to take your family down to the Straight River to explore its banks. A nice place to start your exploration is just below the Honor Point overlook. Discoveries along the river include interesting rocks, shells, bones, driftwood, and fossils.  You’re not likely to find a T-Rex bone

River bank shell finds

Shells found along the banks of the Straight River.

but River Bend was once located on a very different part of the planet and was covered by oceans so you are likely to find the fossils of ocean creatures like gastropods, brachiopods, corals, and more. We have a helpful brochure available that describes the different types of fossils you may find on your river search.  Please remember everything found at River Bend needs to stay at River Bend and cannot be taken home for your collection so be sure to bring your camera to take pictures of your finds.

3.  Go to a Public Program: River Bend public programs happen all year, cover a range of topics, and often have a seasonal theme. If you love birds, our free Bagels & Birds program is held on the first Saturday of each month. Beginning November 3rd and continuing into

Milkweed seeds

Milkweed seed pods open to spread their fluffy seeds across the prairie.

winter is a three-part cross-country ski series taught by Zach Hudson, intern naturalist and assistant coach for the St. Olaf ski team. Program coordinator Elaine Loranz will lead adults in a hike to learn to identify and arrange “Winter Weeds” on November 17th.  Crafty types will enjoy “DIY Up-cycled Winter Crafts” with program coordinator Sarah Shimek on December 15th.  Finally, to celebrate (or mourn) the end of fall and beginning of winter you are invited to attend the “Winter Solstice Celebration” on December 21st.  Details about all of these programs can be found on our web site.

2. Glowing Prairie Stroll: Our prairies are a little bit past their prime in terms of blooms and new growth but many prairie plants are fulfilling their biological imperative and are spreading their seeds. Take a stroll

Glowing grass on the prairie

Prairie grass lights up in the low afternoon sunshine across the prairie.

through the prairie and you’ll notice the fluffy white seeds of quite a few different plants like milkweed, thistle, and goldenrod. When I walk along Prairie Loop trail, I love to grab a milkweed seed pod, pull out some seeds, hold my hand high in the air, and then watch the seeds fly away imagining the plants they will become next summer. The prairie grasses are also worth stopping to see in the late afternoon hours as the low sun shines

Horse-drawn wagon rides

Horse-drawn wagon rides at Bats, Bones & Bonfires.

across the prairie because the grass seed heads light up like thousands of tiny little chandeliers glowing on beautiful red and brown stems.

1.  Bats, Bones & Bonfires – October 27th, 4-8pm: The top spot on my fun fall things list has to be reserved for our annual Halloween festival Bats, Bones & Bonfires. This event is designed to be fun (not scary) for all ages of Halloween aficionados.  Attractions include horse-drawn wagon rides, a yucky nature

Jack O' Lantern Contest

Help us fill our Jack O’ Lantern trail with pumpkins by entering your Jack O’ Lanterns in our contest.

haunted house, a bouncy house, and much more. New this year will be belly dancers,  fire spinners, and costume portraits by Katie Brien Photography. Enter your pumpkin in our Jack O’ Lantern contest for a chance to win a prize. Buy hot dogs and s’mores to cook over our campfires (or buy pre-cooked). Other yummy food and drinks will also be available. Before you head home be sure to stop and pick up free goody bags for your kids!  Admission is $4 per person with kids 2 and under free. River Bend members get in free with their member card. This enjoyable, budget-friendly event should be on every family’s “must-do” list this fall.

Jill Engle is the marketing & communications coordinator for the River Bend Nature Center, a member supported non-profit dedicated to helping people discover, enjoy, understand and preserve the incredible natural world that surrounds us. Contact her at engle@rbnc.org or 507-332-7151.