Grumpy Old Men

While baby bird season is beginning to wind down, we are still receiving Mockingbirds, Blue Jays and Dove. The pictured Mockingbird is a fledgling. From hatching of an altricial species to the unfurling of enough flight feathers to flutter short distances is considered the nestling stage. Babies are completely dependent on the parents at this stage for nourishment, warmth and protection. Once they fledge, the young will continue to beg for food, but will begin to search for food on their own. Within a few days they are flying well and feeding themselves. Precocial species like Killdeer, chickens and ducks are mobile and self-feeding shortly after hatching. They require mom’s protection and guidance to find good sources of food. They will hang together as a group until the young are flying well. Then the group will disperse. Raptors, especially the larger owls have an additional development phase called branchling that occurs between nestling and fledgling. Branchling babies can’t really fly yet, but they leave the nest and spread out along the nearby branches. They continue to be fed by the parents and strengthen their wings by vigorous flapping. They begin to experiment with flight by jumping and fluttering between branches.

Let's Go Fly a Kite!

A newly hatched Mississippi Kite is a fearsome sight, despite its poufy white down. The beak leaves absolutely no doubt that this bird is a raptor. Which is a little odd since it grows up to prefer grasshoppers and cicada caught on the wing to mice and rats or rabbits. Only the smallest raptors, such as Screech Owls prefer insects and amphibians to mice and rats. The Kite doesn’t really fit the bill. The Mississippi Kite is a small to medium raptor that is about the size of a Peregrine Falcon. However, the falcon can weigh as much as three times as much. The eating habits aren’t the only slightly odd habit. Mississippi Kites migrate long distances to and from central South America in a groups of 20 – 30 individuals. They also nest near each other as a group. Mississippi Kite arrive at the nesting site as mated pairs. Many raptors don’t migrate and those that do usually don’t do so as a flock. The Mississippi Kite isn’t a well known raptor. People that see them often mistake them for other birds because the Kite’s gray coloring is so different from other more well known raptors. The head and back are a beautiful pearl gray which darkens along the sides and out the wings. The wings are unusually long (up to three feet) and narrow. The undersides of the wings are a lighter gray. The tail is long and a very dark gray or black. Juveniles have dark brown mottling or stripes and dark brown banding on the tail. This group of juveniles look much like more “traditional” raptors because of their brown markings. They have been released from the large flight cage, but [...]

Aren’t White Animals Albino?

The short answer is no. There are three major categories of white animals. The first is genetically white - white tigers receive a recessive white allele from each parent. If two white tigers mate, then all the offspring will be white. A heterozygous normal phenotype mated with a white phenotype would yield half normal and half white. Genetically white animals are usually a true white; dark stripes, rings or masks usually appear the same color (sometimes diluted) as found in the normal phenotype. The eyes are the normal color.   Albinism occurs when melanin is not produced by melanocytes. Melanin is the pigment that colors our skin. Sunlight stimulates its production. The melanin provides protection from UV damage. This protection extends to the eyes. Without melanin to protect them, eyes suffer from many issues including photosensitivity.   Albinism is easily identified by the striking red eyes. Eyes appear red or pink because without melanin in the iris, the capillaries inside the eye show through. Even animals that have genetically blue eyes will have a pink cast because the melanin helps provide opacity. The coat color will be a creamy white to pale yellow – the color isn’t a true white. Dark markings will be expressed as gray or pale tan. Most animals express as completely albino, but there are cases when only certain parts of the body are affected.   Many believe that albinism is a freak occurrence. However, albinism is actually genetic. It is a recessive trait that can be inherited. Most types strike males and females equally, but there is one type that is X-linked. The melanocytes are normal, but the body either doesn’t produce a necessary enzyme or produces a defective enzyme. [...]

Nature’s Nuclear Deterrent

The Wildlife Center continues to receive wildlife that was displaced by the recent rains. Mom has moved her kits to the second most safe place she knows…but because of her natural perfume (skunks always smell a little like…well, skunk) the humans and dogs know she’s moved in. This rarely ends well for either party. An interesting fact - it is actually difficult to get a skunk to spray. They hoard their chemical weapon since they only have four or five sprays at a time and it takes ten days to make more. The big caveat is “unless they are startled”. Skunks are very nearsighted (and a little cross-eyed in appearance) and you have to be dangerously close for them to see you. Given the opportunity to flee they will, however there isn’t a self-respecting dog that won’t make a wild dash to see what smells so “wonderful”. Dogs don’t seem to learn their lesson either. Other wild animals give it wide berth. Skunks have a whole ritual to warn off before spraying. There's no biologic reason for it, but if an animal goes the other way without the skunk having to spray, they get to save ammunition for later. First they arch the back, then begin pounding the front feet - at this point you should be making tracks because next they flip the business end towards you and cut loose. Some will bounce the backend up for better aim, while others actually do a brief handstand. The only known predator of the skunk is the Great Horned Owl. Considering how many Great Horned Owl babies come to the Wildlife Center smelling like skunk, it must be a favorite meal. Skunks are nearsighted and can't [...]

Recent Rains

The recent rains have knocked all sorts of babies from their nests and rising water is forcing ground dwellers (including ants!) to move to higher ground. CLICK HERE to see a brief video interview of Debbie Mitchell (Staff Wildlife Center) by Meera Nandlal (Spokesperson Houston SPCA) concerning the impact of the recent rains on wildlife. CLICK HERE to go to an article that will help you decide if a found animal needs help and if so what should be done to maximize survival. WR&E is affiliated with the Houston SPCA and we extend our thanks for their efforts to educate the public.

By |July 7th, 2010|Categories: Wildlife Rescue|0 Comments

The Hawk that isn't a Hawk

The life history of the Common Nighthawk is so tightly tied to our own that it is amazing how successfully they fly “under the radar”. They have adapted so completely to our urbanization of their environment there is not a grocery store or shopping mall that isn’t patrolled by these voracious insect eaters. Normally crepuscular in habit (feeding at dawn and dusk), they swarm parking lot security lights at all hours. Nighthawks belong to the Nightjar family which includes Whip-poor-will and Chuck-will’s-widow. The family is called  Caprimulgidae from the Latin caper which means goat and mulgeo to milk or suck.  There is a legend that these birds sucked milk from goat in the night but they actually were feeding on flying insects stirred up by the goats.  Another legend has them sucking the blood of goats. Biting insects attack the goats causing them to bleed. The innocent Nighthawks were eating the insects preying on the goats. Common Nighthawk eat and drink “on the wing”, which means that they snatch insects in flight and skim calm lakes and creeks for water. The tiny beak belies the astounding gape of these birds. Unlike many birds that eat on the wing and use the beak to manipulate the prey before swallowing, the Nighthawk simply sweeps the air like a butterfly net scooping up everything in its path. Considered to be strictly ground nesters, the flat gravel covered roofs provide uniquely predator proof nesting sites. In the “wild” these birds rest on the ground where they blend perfectly into the leaf-litter. When startled, they bounce relatively short distances and try to hide again. Like the Whale Shark, which is neither a shark or a whale, the Nighthawk doesn’t exclusively [...]

Home Sweet Home

The three armadillo brothers that were raised at the Wildlife Center since they were a couple of days old were taken to a remote site that already has armadillo on it for release. It was wonderful to witness these unusual mammals grow, change and learn. Watching their instinctual behavior emerge gave us confidence that these boys would have the tools they needed to survive at release. The landowner dug a trench to create an artificial den. At the uphill end of the trench, he placed a five-gallon bucket. To the cap of the bucket, he connected  a “tunnel” of metal dryer vent. Then everything except the entrance was buried. A low fence was erected to guide the armadillo to the nearby pond. Back-up food was provided. The armadillo had been busy digging around the enclosure, so the fence was removed. The landowner dug up the den one week later check on the health and well-being of the brothers. He discovered that two of the three armadillo was still calling it home. It is thought that the largest of the three was probably foraging nearby or had struck out on his own. It is expected that the remaining two will eventually abandon the artificial den, but it will be there in case they need a place to hide. What a perfect release! It makes all of the work worthwhile.

Under Their Wing

The Wildlife Center of Texas has ongoing relationships with homeowners that have the same issue year after year with nesting birds on their property. Usually the birds in question are those with strong site fidelity such as hawks, owls and herons. One family has taken Red-Shouldered Hawks “under their wing”. Each year nestlings and fledglings get blown or shoved out of the nest. After the Wildlife Center of Texas checks them out and provides several good meals, the babies are renested. The first permutation was the animal kennel strapped to the tree. (Don’t forget drain holes or a heavy rain will drown the very animals you are trying to save) It isn’t beautiful, but the parents faithfully raised their babies. When predators became a problem, another kennel was placed on top of a shed. This kennel had holes in the sides that were big enough for the parent to stick in their head to feed, but too small for the predator. The parents adapted beautifully and continued to feed their offspring. Once the chicks were large enough to fend off the predator, they were moved to an open airline kennel. So intrigued about the behavior of the hawks and to check up on the parents to make sure they were caring for their offspring, they mounted webcams. Family and friends delighted in watching the parents bring food to their chicks. They aren’t the only people we have heard of doing this. One raccoon lover set up webcams so he could keep track of his charges. Concerned that the parents were having difficulty feeding themselves and their offspring, the family began providing supplemental food if one or more babies was in the original nest and others [...]

Two for Tea

Young mammals may appear lost and alone while they explore or wait for parents to return from foraging for food nearby. This is especially true for deer and rabbits who intentionally do not remain with their baby(ies) during the day. Every year the Wildlife Center receives hundreds of babies that were kidnapped from their parents by well-meaning rescuers. You need to know the behavior of the animal in question and some things to look for to make an informed decision about whether or not the baby(ies) need to be rescued. Each time the mom deer or rabbit returns from foraging, she leaves another scent trail that could potentially lead a predator to the nest. While she is in the nest, her scent is a big neon sign pointing not only to her, but to her baby(ies). So, as the baby gets older and can go longer between nursing, she spends more and more time nearby, but not with her offspring. Deer further confuse predators my moving their fawn(s) from one location to another. In fact, prey animals often build their burrows and park their babies near human buildings because they know predators like coyote are less likely to approach. They are much less afraid of us and our domestic animals than they are of coyotes, feral dogs, raccoon and raptors. Every golf course has a story of mother deer parking the fawns against the clubhouse during the day. So what to do when a rabbit’s den is found or a fawn is seen? Usually the babies are just fine where they are, but you should conduct a quick inspection. It is an old wives’ tale that the parent will reject babies that have been touched. [...]

By |June 5th, 2010|Categories: Deer, Rabbit, Wildlife Rescue|Tags: , |0 Comments

Mountains out of Molehills

The Wildlife Center had a first this week – Moles! Volunteers were shocked at what beautiful fur they had. The person who rescued them was performing excavation work when they inadvertently dug into their den. Moles have unusual fur in that it doesn’t have a nap. In other words, the fur doesn’t lay in one direction like cats and dogs. Chinchilla come to mind when observing the moles. The other physical attribute that jumped out at volunteers was the size and orientation of the front legs. Place the top of each hand against the other – that’s the permanent orientation of the mole’s front legs. This is great for digging laterally, but not that great for walking. In addition, the front paws are two to three times larger than the back and are tipped in humongous (a very technical term!) claws. Each paw looks like a little excavator bucket. Yet, the skin on the pads is as moist and soft as a baby’s. The volunteer that held the moles for a couple of quick pictures and a brief health exam noted that they constantly nibbled her skin, tasting as much as smelling as they quickly moved back and forth. The claws felt sharp, but didn’t prick like arboreal species like squirrels which have claws that are tipped with tiny barbs. Most moles live underground, but some feed above ground and others are semi-aquatic. The favorite meals are invertebrates, especially earthworms. Moles have a paralyzing or sedating component in their saliva that immobilizes earthworms which they can store in a “larder” for future consumption. There is usually no external indication of ears and the eyes are very small and often covered in skin or fur. For [...]

By |June 3rd, 2010|Categories: Mole, Wildlife Rescue|Tags: |0 Comments
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