Monarch Butterflies Are Getting Increasing Scarce. Photo: Keenan Adams, USFWS
These Beautiful Flying Insects Are In Major Trouble. Here’s What You Can Do.
All across North America and Mexico, the numbers of monarch butterflies are dwindling. A conservation organization called the Xerces Society estimates that the monarch population has declined by 90 percent over the last 20 years. There are several reasons for this decline including global climate change and habitat loss, but the biggest factor seems to be a decrease in the amount of milkweed available to the butterflies. Milkweed is a plant that grows in open areas—on the edges of fields and in fields that have become overgrown. Monarch butterflies lay their eggs on milkweed, and the young caterpillars that hatch out of those eggs feed on its leaves.
During recent decades, large commercial farms across the continent have been spraying their fields with chemicals that kill weeds such as milkweed without harming the crops. Less milkweed has meant many fewer butterflies. Commercial farmers and Monsanto, the chemical company that manufactures one of the most widely used weed-killing chemicals, are unlikely to stop destroying milkweed without a lot of pressure from the American people and government, and time may be running out. [click to continue…]
A Rare Reason For (Cautious) Celebration On The Endangered Species Front. Photo: Michael Gabler
The Population Is Up For This Colorful Endangered Dog Of The African Plains
The African wild dog is the most colorful member of the canid family in more ways than one. Lycaon pictus is also called the painted dog because of it’s beautiful, multicolored coat. But this endangered animal’s family life also comprises a fascinating picture.
Like wolves, wild dogs live in packs in which an alpha male and an alpha female—usually the parents of most of the other dogs—are the only animals that breed. All the other pack members help care for the alpha pair’s young. In order to avoid being detected by hyenas and lions, which are larger than wild dogs and like to steal their kills and kill their young, pack members communicate through a series of soft squeaking sounds that larger predators have a hard time hearing.
When one of the alpha animals dies, the pack often breaks up as individual dogs set out in search of mates who are not their brothers and sisters.
The wild dog’s favorite prey animals are antelope, wildebeest, zebras, and warthogs.
Until the 20th Century, wild dogs were common throughout most of Africa. In fact, author Isak Dinesen (Karen Blixen), who wrote a book called Out of Africa, claimed to have seen 500 wild dogs traveling together on Kenya’s Serengeti Plain in the early 1900′s.
But shrinking habitat, conflicts with humans, and diseases such as distemper that they contracted from domesticated dogs all took their toll, and by the 1990′s scientists were estimating that there were 5,000 or fewer of them living in scattered areas, mostly in the southern half of the continent. Wild dogs were—and still are—considered to be among the most endangered of Africa’s mammals. However, according to a recent report in the The New York Times the painted dog’s population numbers recently have begun to recover. [click to continue…]
A Red-Eyed Tree Frog. Photo Taken in Costa Rica By charlesjsharp
Teachers And Students Take Note: Here’s A Free Set Of Books On Threatened Amphibians
Aamphibians are among the animals hit hardest by such environmental factors as climate change, manmade chemicals in the air and water, habitat destruction due to human activity, and a deadly fungal illness that has been spreading around the globe. Many frogs and other amphibian species have been designated as Endangered or Threatened—and some have even gone extinct.
Fortunately, there are a number of groups dedicated to the fight to conserve amphibians and the wild, wet habitats they need to survive. One such organization is called the Amphibian Survival Alliance. Currently, the ASA is hoping to attract as many like-minded people as possible to the cause of amphibian conservation—and one way they are doing this is by giving away an electronic version of a gorgeous collection of books containing information about all the earth’s Threatened and Endangered amphibian species. [click to continue…]
Illegal Hunters Are Killing African Elephants At An Alarming Rate. Photo: nickandme|2006
Illegal Hunting Is Endangering The Last Of The Wild Elephants In Africa
The African elephant ranks among the most majestic animals in the world. Not only is the elephant earth’s largest land animal, but it is also one of the most intelligent creatures, and its life span is almost as long as ours. When elephant mothers are pregnant, they carry their their unborn babies for more than twice as long as a human mother does. Elephants live in family groups where they take care of one another.
Unfortunately, illegal hunting, or poaching, of elephants has increased greatly over the last 10 years. So many thousands of elephants are now killed all over Africa each year that the animals are in danger of vanishing from the wild. [click to continue…]
Feral Cats Kill More Than Half A Billion Birds A Year. Photo: Stavrolos
Feral Pets And Livestock Take A Terrible Toll On Wild Creatures And Wildlife Habitats
A feral animal is a pet or farm animal that lives in the wild after having escaped or been released. For just a few examples, in America there are millions of feral cats and pigs, and tens of thousands of feral horses and burros.
Feral animals are almost always highly destructive to wildlife and the places where wild animals live because they do not have a natural place in those environments and among those animals. For instance, feral and free-roaming cats are able to kill hundreds of millions of North American birds each year because the birds did not evolve in an environment that included cats. Our birds evolved natural defenses to protect themselves and their young against native predators such as hawks, owls, raccoons, and snakes—but never against cats. [click to continue…]
When Is A Whale Not A Whale?
Really? The Killer Dolphin?
Orcas certainly look like whales to us. After all, they grow to a length of 30 feet. But scientists have classified them as being in the same family—Delphinidae—as the 31 other species of ocean-dwelling dolphins, most of which are so much smaller than orcas that orcas would gladly eat them if they had a chance.
Although the orca’s huge size seems un-dolphinlike to us, its curved dorsal fin and pyramid-shaped teeth identify it as a true member of the dolphin family. Orcas also travel in large family groups, which is a behavioral characteristic that distinguishes dolphins from other, less gregarious, kinds of cetaceans such as propoises and baleen whales. [click to continue…]
A Red Deer Browses on Tall Ferns. Photo: Kevin Law
Some Plant Eaters Graze, Others Browse—And Some Do Both. What’s The Difference?
Aanimals with hooves, such as deer, antelope, sheep, goats, horses, and cattle have different strategies for feeding themselves. Some, such as horses and cattle, are grazers, which means they eat grass. In fact, the word “graze” is derived from the word “grass.”
Other animals, including most members of the deer family, are browsers. This means that they eat a variety of plant material including leaves, tree bark, and the tips of branches. When people see deer eating shrubs in their backyards, those deer are browsing on the shrubs.
Grazing works well for plant-eaters that live and feed in open areas where grass is plentiful. But grass is scarce in forests and swamps, and that’s where browsers have an advantage. However, most browsing animals will do some grazing when they are in a meadow, and many grazers will sample vegetation other than grass when they are moving through a woodland. Nonetheless, grazers and browsers usually have different types of teeth to help them bite and chew the foods they eat most often. [click to continue…]