Showing posts with label armadillo. Show all posts
Showing posts with label armadillo. Show all posts

Thursday, June 11, 2015

'Dillo Trouble



Checked the Butterfly Garden at Hagerman National Wildlife Refuge and found we have had a night visitor. This visitor’s diet, according to the National Wildlife Federation, might consist of “… almost 500 different foods, most of which are insects and invertebrates such as beetles, cockroaches, wasps, yellow jackets, fire ants, scorpions, spiders, snails, and white grubs. A lesser part of the diet is comprised of small reptiles and amphibians and mammals, and  reptile and bird eggs. Less than 10 percent of the diet is from fruit, seeds, fungi, and other plant matter.” In our case, the visitor, who finds food through his sense of smell, is ploughing up areas of the garden as he roots for the insects and invertebrates. He can have the grubs but in the process he is uprooting desirable plants!

Our visitor is a nine-banded armadillo, the only species of ‘dillo found in the United States. “The term “armadillo” means 'little armored one,' and refers to the presence of bony, armor-like plates covering their body. Despite their name, nine-banded armadillos can have 7 to 11 bands on their armor.”

Dillo at HNWR, by Dick Malnory


In an essay, “The Night of the Armadillos” by Bertram Rota (Literary Austin, Ed. Don Graham, TCU Press, 2007), the London author reports seeing an armadillo in the wild for the first time: “An armadillo! As large as life and twice as natural in the eyes of a Londoner who had never seen this prehistoric survival outside the London Zoo…A good two feet long and armoured like a tank, the creature quietly nibbled grass, quite unruffled.” Then Rota presents an interesting picture of six grown men, including J. Frank Dobie, their host, plunging through knee-high grass, with Dobie exhorting his guests, “They root up everything I plant. Done more damage than I can bear” and “…drive them into the creek”. After all sorts of maneuvers by the chasers, they finally gave up the battle, declaring “It was a fair fight, six to six, but the armadillos won. In a sudden scurry all were gone and quietness reigned.”

Those who feel helpless in the face of the midnight forager might take comfort in the fact, from NWF, that “Armadillos have long been a source of food for humans. The nine-banded was nicknamed “Hoover hog” and “poor man’s pork” by people who blamed President Hoover for the Great Depression.”

According to Texas Parks and Wildlife, “Armadillos are found in all but the western Trans-Pecos portion of Texas in a variety of habitats; brush, woods, scrub and grasslands. Originally from South America, they are now in Texas, Oklahoma, Kansas and Louisiana. Their distribution is often based on soil conditions, and they are not found where the soil is too hard to dig.”

“Although breeding occurs in July, the embryo remains in a dormant state until November. Four young are born in a burrow in March. All four young, always of the same sex, are identical quadruplets and developed from the same egg. They even share a single placenta while in the womb. Armadillos are the only mammals in which multiple young form from a single egg with any regularity.”

Armadillos can live from 7 – 20 years in the wild. Their Conservation Status is “Increasing”. From the NWF:  “Humans have killed off most of their natural predators, and roadways have offered them easier means of travel to new habitats. Nine-banded armadillos have a tendency to jump straight up into the air when they are startled. This often leads to their demise on highways. They are small enough that cars can pass right over them, but they leap up and hit the undercarriage of vehicles. They are also poisoned, shot, or captured by people that consider them lawn and agricultural pests. Some are eaten or used for the curio trade.”

Last - what about leprosy?  According to an recent article in Smithsonian magazine, "... with a body temperature of just 90 degrees, one hypothesis suggests, the armadillo presents a kind of Goldilocks condition for the disease—not too hot, not too cold. Bacterial transmission to people can occur when we handle or eat the animal.  The easiest way to avoid contagion is to simply avoid unnecessary contact with the critters.

We would have more R-E-S-P-E-C-T for the State Small Mammal of Texas if he would go elsewhere for dinner!











Monday, July 19, 2010

Why Did the Chicken Cross the Road, Part II


By Johnny Beall - Conclusion to the Essay Posted July 12

Armadillos are armored creatures that have little fear of most predators because, when threatened, they roll into a ball, exposing only their very tough outer shell to attack. The mouths of most predators are too small to get their teeth in position to bite this tough ball and are unsuccessful in their attack. Therefore the armadillo has not developed a strong flight instinct such as soft-bodied animals like rabbits have developed. And, when the huge noisy predator with the bright, shining eyes, comes racing in, they fail to remove themselves from harm’s way, trusting that their armor will protect them.

The other defect in the armadillo’s nature is its second defensive tactic when confronted with an enemy. It jumps about two or three feet straight up into the air. This tactic may work against a dog or other animal but against an 18-wheeler, which would otherwise pass right over the armadillo and not harm it due to high clearance, leads to road pizza when the armadillo jumps.

First recorded in Texas in 1849, the armadillo expanded its range northward and eastward, at times aided by pranksters and animal dealers. In Florida, releases from a zoo in 1924 and a circus truck in 1936 started another migrating population. Now the northern edge of armadillo territory runs through Kansas, Missouri, Tennessee, Alabama, Georgia and South Carolina. Thought this expansion has taken almost 150 years, that’s fast for the mammal that has been chosen the State Small Mammal of Texas.

Brenda Loveless, a winner in the 2010 Refuge Photo Contest, sent the photo shown above, and says, “I was so excited back in May to finally see two live 'dillers’ very close to a little access road near Lake Bardwell (close to Ennis)”. Thanks to Johnny and to Brenda for the saga of the ‘dillo, Part II.

Armadillos are among the array of mammals to be seen at Hagerman National Wildlife Refuge, including deer, bobcats, coyotes, feral hogs and more. For the official Refuge website, see http://www.fws.gov/southwest/refuges/texas/hagerman/index.html and for information about the Friends of Hagerman, programs and events, see http://www.friendsofhagerman.com.


Monday, July 12, 2010

Why Did the Chicken Cross the Road?


By Johnny Beall

(Ed. Note: Essay originally published in the Featherless Flyer, Vol I, Issue 4, September 2004)

Why did the chicken cross the road? Of course, it was to prove to the armadillo that it was possible.

In the competition to see who is first in the number of road kills of all vertebrates in the southern United States, it always seems to be a close race between the opossums and the armadillos. It seems the armadillos edge the opossums, but not by much.

Armadillos are a unique species in North America in that they produce one litter per year, and that litter is always identical quadruplets. This means that each of the four is genetically identical to the others, even to all being of the same sex. Armadillos are close kin to anteaters and sloths which occur in South America. Actually the armadillo migrated here from South America and many people can recall when the first ones moved into this area.

Now for the big question, why do so many armadillos become road pizza? A look at their teeth will provide a clue. They have no incisors or canines and their primitive teeth are adapted for eating invertebrates, which include many insects.

Billions of insects are hit by speeding automobile every day and set a gourmet smorgasbord for the insect eating armadillo. But there is always a “catch” in any good deal, and the “catch” in this feast is that the table is set on the highway. Armadillos are nocturnal so they go picking amongst the beetles and butterflies on the highway in the dark. The next vehicle adds the armadillo to the carnage because of two major defects to its nature when faced with modern technology.

Ed: Want to know what those two defects are??? To be continued next week!

See armadillos and more at Hagerman NWR. For activities and programs at the Refuge, visit http://www.friendsofhagerman.com and for the official Refuge website, go to http://www.fws.gov/southwest/refuges/texas/hagerman/index.html.

Johnny Beall retired as Hagerman NWR Manager in May, 2008, after 35 years with the US FWS including seven years at Hagerman. Photo from Hagerman NWR photo files.