Critters
on the ILC

The ILC is close to woods and wildlife. Rabbits, mice, skunks, squirrels, opossums, armadillos, and raccoons are common in the area.  These animals are generally not dangerous, although they may annoy you and you should avoid them.

Insects are another group of “critters” that require pro-active measures. Cockroaches, crickets, scorpions, chiggers, fleas, and ticks are equally undesirable.  Each year the Center arranges for a Pesticide Control company to come and spray Center buildings, interior and exterior.   The spray is harmless to humans and animals while successfully controlling insects for several months.

Here is information about other critters you should give special attention to avoid:

Mosquitoes

The West Nile Virus is carried by mosquitoes in this area. Symptoms of the West
Nile Virus include: fever, headache, neck stiffness, muscle weakness and
tremors. Health professionals are advising that all North Texans should
do the following:

  • Stay indoors at dawn, dusk, and in the early evening

  • Wear long-sleeved shirts and long pants when outdoors

  • Spray clothing with repellents containing permethrin or DEET

  • Contact the Housing Office to repair or replace any screens that have tears or holes


Tarantulas

Tarantulas might be seen wandering about at nightfall. The tarantula is generally big and black or brown with hairy legs.  They live in holes in the ground.  Heavy rains may flood them out of their ground burrows, and they will occasionally climb walls.  They are relatively benign and will only bite defensively. If disturbed, they may raise their front legs in a warning gesture. They can jump and bite, but their bite is not normally venomous to humans. If you are not comfortable with them around your home, you can nudge them into a jar and release them as far away as you like.  Tarantulas are beneficial to humans because they feed on cockroaches, crickets, and scorpions. 


Scorpions

Scorpions may be found anywhere. They are difficult to control by pesticides alone.  They normally prey on insects and spiders, paralyzing them with venom ejected from the tail. Their sting is also used defensively. The toxicity of the venom varies according to the species and amount injected.  The “Texas Brown” is perhaps the most dangerous for humans.

The venom of this scorpion can cause severe pain and swelling at the site of the sting, numbness,
frothing at the mouth, respiratory difficulties, muscle twitching, and convulsions. The sting is more dangerous to infants, small children, and the elderly.  www.desertusa.com.

Precautions:  Plug up all possible entrances to the home around doorways and screens for example.  Shake out clothing and shoes before putting on.  Check equipment left outside before using, wear shoes, and use gloves in the yard.


Fire Ants

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Fire Ants look very much like ordinary house or garden ants but are serious pests.  They inflict a fiery sting, which causes a small blister to form at the site of each sting after several hours. The blisters become itchy while healing and are prone to infection if broken.

Fire ants are small, coppery-brown in color on the head and body, with a darker abdomen.  They come in a variety of sizes within one nest.  They are aggressive, particularly near the nest.

 
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Their nests can appear as dome-shaped mounds, or can also be found underneath other objects
found on the ground, such as timber, logs, rocks, bricks, etc.  If you find a nest, do not touch it!!

If they get on you, brush them off as quickly as possible:

  • Apply a cold compress to relieve the swelling and pain.

  • Gently wash the affected area with soap and water and leave the blister intact.

  • People who are allergic to insect stings should seek medical attention immediately. On rare occasions, fire ant stings can cause severe allergic reaction (anaphylaxis).


Asp Caterpillars

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These caterpillars grow to about 1 inch long, are furry in appearance, and completely covered by thick
tan to grayish-white hairs that taper toward the back end. Among the long body hairs are shorter spines that discharge venom upon contact. The head and legs are not visible from above. The night-active adults, known as flannel moths, are rarely encountered.

Many hairy or spiny caterpillars may irritate the skin on contact, and care should be taken to avoid touching them.  The Asp Caterpillar (called the puss caterpillar outside of Texas) is especially painful.  Any contact with the Asp Caterpillar produces a painful skin rash because the spines contain venom. Hypersensitive individuals may experience a generalized systemic reaction requiring medical
attention.

Warning:  Do not handle caterpillars (larvae) with bare hands


Bobcats

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Bobcats are resident in the area, and there have been numerous sightings in the ILC and along Camp Wisdom Road. The Bobcat is bigger than a domestic cat. It has small ear tufts and cheek ruffs, a dark tip covering only the top of its ‘stumpy’ tail, and a patterned and varied coat coloration. Ground fur color ranges from light grey to yellowish brown to reddish brown, and markings vary from ‘tabby’ stripes to heavy spotting. Bobcats are bold but not normally aggressive towards humans. Their preferred prey is rabbits, but they also hunt squirrels, chipmunks, rodents, and birds. Occasionally they have attacked domestic cats. They hunt both by night and day, usually at times corresponding to peak periods
of activity of rabbits.


Snakes

Snakes come out of hibernation and become active as the weather warms up. There are many varieties seen on campus, both venomous and non-venomous. Upon encountering a snake, stop and move to a safe distance from the snake prior to attempting to determine the kind of snake and/or where it goes.

Rat Snakes
(non-venomous)

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They can be left undisturbed.  If threatened (i.e., poked or touched) they will readily defend themselves by coiling up, raising the head, opening their mouths, and striking out repeatedly at anything that gets too close. They may also vibrate their tail, which causes them to be mistaken for a rattlesnake; however, the tail is slender with no rattles.

Rat snakes can grow to several feet long. The background color of an adult Texas Rat Snake will range from shades of brown to yellow and even orange, and the blotches are much less distinguishable in adult specimens. The top of an adult’s head is slate gray to black on top and white underneath and a lighter colored body that has dark saddle-shaped blotches on the back. As the name implies, the Texas Rat Snake's primary diet is mice and rats, causing them to be commonly seen in any place inhabited by rodents - including human homes. However, if rodent prey is not readily available, they can climb quite high in a tree to get to a bird nest.

Rattlesnakes (venomous)

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There are many varieties of rattlesnakes in our area, and they display some variation of color and marking. Most have light and dark alternating tail rings. Generally, the body may be brown (more grey around here) and darker diamonds or markings on the back. Rattlers are heavy-bodied snakes and may be up to seven feet long. Because of their size and aggressiveness, rattlesnakes may be quite dangerous.

Copperheads (venomous)

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The three Texas Copperheads resemble one another in having the same general pattern of chestnut or reddish-brown cross bands on a lighter body color. Copperheads are most common in the rocky areas of hilly country as well as in the wooded bottomlands. They are generally small and have short fangs, so a fatal bite rarely occurs but may be quite dangerous.  They have been found around some mobile homes

Red and yellow, kills a fellow! Red and black, friendly Jacks!
Coral on the left and Milk snake on the right,

Coral on the left and Milk snake on the right,

 

Cottonmouths (venomous)

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Cottonmouths are one of Texas's largest (average 4 feet long) and most heavy-bodied snake. Markings and color of this snake are quite variable, but their color is basically dark brown with 10-15 wide, dark cross bands. The Cottonmouth is semi aquatic but may be found up to a mile from water.

Coral Snakes (venomous)

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Coral snakes are generally small and slender. They are marked by a pattern of black, yellow, and red adjacent bands.  A Boy Scout rhyme helps differentiate the coral snake from a colorful non venomous snake also found in this area: “Red and yellow, kills a
fellow! Red and black, friendly Jacks!”

Regarding Venomous Snakes

  • Caution is advised particularly at night. Snakes like the warm roadways. It is recommended to use a flashlight to prevent an unexpected encounter.  Pit vipers are venomous snakes that have an opening on each side of the head between the eye and the nostril.  In Texas, we have groups of these snakes: Copperheads, Cottonmouths, and Rattlesnakes. Be familiar with which venomous snakes occur in your area and have a good idea about what they look like.

  • Do not approach a snake to determine if it is poisonous!  Snakes strike from a coiled position and they can coil VERY FAST.  The distance a snake can strike is said to be about 1/3 of its length.  If you hear a rattle, don’t move until you know where the sound is coming from.  Pit vipers strike at movement.

  • Yell for help and keep the snake in sight if possible. Call Facilities Management (972-708-7425 and push 4)

  • Defend yourself

    • A long handle shovel is a good defense against a strike. (The snake will give up hitting his head against the shovel and move away.)

    • The long handle shovel can also be used to kill a venomous snake with a down stroke of the blade on its fleeing back.

  • Some characteristics that you can tell from a safer distance

    • Color and pattern.

    • Triangular head and narrowing at the neck.

    • Tail shape and rattles.


Venomous Spiders

Brown Recluse

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Adult brown recluse spiders are soft-bodied, yellowish-tan to dark brown, about 1/4 to 1/2 inch long and have long, delicate grayish to dark brown legs covered with short dark hairs. The leg span is about the size of a half dollar. Distinguishing characteristics are the presence of three pairs of eyes arranged in a semicircle on the forepart of the head and a violin-shaped, dark marking immediately behind the semicircle of eyes with the neck of the violin pointing towards the abdomen. This spider is most active at night when it comes out in search of food consisting of cockroaches and other small insects.

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Outdoors, the spider may be found in sheltered corners among debris, in wood piles, under loose bark and stones, in old barns, storage sheds, and garages.  Indoors, they may be in undisturbed places under furniture, appliances and carpets, or in corners and crevices. Some have been found in stored clothing and towels, old shoes, and on the undersides of tables and chairs.

A Brown Recluse bite may go unnoticed for 6-8 hours, before a reddening, swelling, and blistering of
the wound starts to appear. The occurrence of additional symptoms of a recluse bite will depend upon the amount of venom injected by the spider. A severe bite can produce an area of dead skin tissue that may require surgery.

 

Black Widow

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Black widows are found in every state except Alaska. They are found in grass, under stones, beneath pieces of wood, in rodent burrows, or in any protected cavities: females are 1-2" in diameter (males much smaller). The female black widow is shiny black with a red hourglass on abdomen;    however this does not always have to be the case. The red hourglass could take the form of a red dot or many variations of shapes.

The black widow is common in fields, woodpiles, and unoccupied dwellings. The initial bite may be very painful, but might go unnoticed. The surface of the skin may display two red bite wounds, one, or none. The worst pain is in the first 8-12 hours; symptoms may continue for several days.  It may produce muscle spasm and often mimics that of a severe abdominal problem (i.e., acute appendicitis, or ruptured
ovarian cyst).

To identify the bite, look for two small red spots and local swelling. Individual may develop abdominal pain, a rise in blood pressure, nausea, profuse sweating, leg cramps, tremors, loss of muscle tone, vomiting, and difficulty in breathing and lying down.


Medical Aid

Charlton Methodist Hospital:  214-947-7777; 3500 West Wheatland Road
Care Now:   972-780-0802; Lyndon B Johnson Freeway, Dallas, TX 75237
North Central Texas Poison Center:  1-800-222-1222
Primacare Clinic 972-637-5100, 642 Uptown Blvd, Cedar Hill