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Wildlife Die-Offs are Relatively Common, Recent Bird Deaths Caused by Impact Trauma

By Guest PostJanuary 11, 2011Naturearkansas, arkansas bird analyses, autopsy, avian botulism, avian cholera, bat species, baton rouge, beebe, bird deaths, david e green, die off, impact trauma, internal hemorrhaging, jonathan sleeman, la, lead poisoning, louisiana, necropsies, new year eve, newcastle disease, North America, parasites, pathologist, pesticide tests, red winged blackbird, starvation, west nile virus, wildlife

Large wildlife die-off events are fairly common, though they should never be ignored, according to the U.S. Geological Survey scientists whose preliminary tests showed that the bird deaths in Arkansas on New Year’s Eve and those in Louisiana were caused by impact trauma.

Preliminary findings from the USGS National Wildlife Health Center’s Arkansas bird analyses suggest that the birds died from impact trauma, and these findings are consistent with the Arkansas Game and Fish Commission’s statement. The State concluded that such trauma was probably a result of the birds being startled by loud noises on the night of Dec. 31, arousing them and causing them to fly into objects such as houses or trees. Scientists at the USGS NWHC performed necropsies—the animal version of an autopsy—on the birds and found internal hemorrhaging, while the pesticide tests they conducted were negative. Results from further laboratory tests are expected to be completed in 2-3 weeks. (more…)

Epic Journeys of Turtles Revealed

By Guest PostJanuary 7, 20111 commentNatureatlantic population, breeding colony, brendan godley, central africa, epic ocean spanning journeys, gabon, high seas, howard rosenbaum, leatherback turtle, leatherbacks, matthew witt, migration behavior, migratory routes, pacific ocean, parcs gabon, satellite tracking, south atlantic, turtle

The epic ocean-spanning journeys of the gigantic leatherback turtle in the South Atlantic have been revealed for the first time thanks to groundbreaking research using satellite tracking.

Experts at the Centre for Ecology and Conservation (Cornwall) at the University of Exeter led a five-year study to find out more about these increasingly rare creatures and inform conservation efforts. (more…)

Colossal Fossil: Museum’s New Whale Skeleton Represents Decades of Research

By Guest PostDecember 18, 2010Natureextinct whale, fossil preparation, fossil whale discoveries, whale evolution, whale skeleton

ANN ARBOR, Mich.—There’s a whale of a new display at the University of Michigan Exhibit Museum of Natural History, a leviathan that represents a scientific saga of equally grand proportions. (more…)

Projected Losses of Arctic Sea-Ice and Polar Bear Habitat may be Reduced if Greenhouse Gas Emissions are Stabilized

By Guest PostDecember 16, 2010Environment, NatureArctic, arctic ocean, Arctic sea ice, atmospheric co2, average global temperature, current co2 levels, emissions, global, greenhouse gas, jessica k robertson, linear, modeling, modeling study, patrick Kelley, polar bears, sea ice habitats, sea ice loss, steve amstrup, usgs

ANCHORAGE, Alaska – Sea-ice habitats essential to polar bears would likely respond positively should more curbs be placed on global greenhouse gas emissions, according to a new modeling study published in the journal, Nature.

The study, led by the U.S. Geological Survey, included university and other federal agency scientists. The research broke new ground in the “tipping point” debate in the scientific community by providing evidence that during this century there does not seem to be a tipping point at which sea-ice loss would become irreversible. (more…)

High-Tech Software and Unmanned Planes Allow Scientists to Keep Tabs on Arctic Seals

By Guest PostDecember 15, 2010Environment, Natureaerial photos, aircraft, Arctic, arctic ringed seal, atmosphere, bearded, bering sea, cameras, climate scientists, earth, elizabeth weatherhead, four species of arctic seals, greenhouse gases, ice floes, marine, noaa, novel project, peter boveng, polar ecosystems, ribbon seals, ringed, scan eagle, sea ice, seal populations, seals, spotted, temperatures, terrestrial mammals

A novel project using cameras mounted on unmanned aircraft flying over the Arctic is serving double duty by assessing the characteristics of declining sea ice and using the same aerial photos to pinpoint seals that have hauled up on ice floes.

The project is the first to use aircraft to monitor ice and seals in remote areas without putting pilots and observers at risk, said Elizabeth Weatherhead of the University of Colorado at Boulder, who is leading the study team. Weatherhead is a senior scientist at the Cooperative Institute for Research in Environmental Sciences, a joint venture of CU-Boulder and the National Oceanic and Atmospheric Administration. (more…)

Crocodiles 168 Times More Dangerous Than Sharks

By PravdaDecember 14, 2010General, Natureakvatoria, angola, bandundu, bees, cancun, cockpit, congo, croc attacks, crocodiles, daniel philemotte, elephants, hendrik coetzee, hippos, kinshansa, lagoon, lauren faille, malaria, marine animals, Mexico, mosquito, predators, salt water crocodile, shark attacks, sharks, south african guide, stewardess, threat to humans, ukraine, yalta

The fears connected with shark attacks are stronger in the world today than those related to much more dangerous predators – crocodiles. However, crocodiles pose a greater threat to humans than sharks do.

A crocodile snatched Hendrik Coetzee, a South African guide, 35, from his kayak while he led an American expedition into the heart of Congo last week. Two American tourists could only watch the scene in horror as the guide was killed and eaten by the predator. They paddled to safety unharmed. Coetzee’s body has not been recovered.

Stories about croc attacks are just as terrible as they are hopeless. Experts say that it is possible to stay to fight off a shark, but it is much more difficult or even impossible to rescue themselves from an attacking croc. (more…)

Ice-Age Reptile Extinctions Provide a Glimpse of Likely Responses to Human-Caused Climate Change

By Guest PostDecember 13, 2010Environment, Natureaegean islands, anthony ives, chances of survival, climate, climate change, ecologist, environmental conditions, extinctions, global warming, greek, greek islands, ice age, johannes foufopoulos, lizards, mediterranean sea, moisture levels, reptile, reptile populations, reptile species, sea levels, snakes, southern hemisphere, turtles

ANN ARBOR, Mich. — A wave of reptile extinctions on the Greek islands over the past 15,000 years may offer a preview of the way plants and animals will respond as the world rapidly warms due to human-caused climate change, according to a University of Michigan ecologist and his colleagues.

The Greek island extinctions also highlight the critical importance of preserving habitat corridors that will enable plants and animals to migrate in response to climate change, thereby maximizing their chances of survival. (more…)

Thermal Imagery Sheds Light on Wolf Disease

By Guest PostDecember 12, 20102 commentsEnvironment, Naturecolored wolves, contagious canine skin disease, coyote, dehydration, disease ecologist, doug smith, elk, grizzly, hypothermia, infections, malnutrition, mange, mites, northern rockies, northern rocky mountain, paul cross, remote cameras, reproduction, sarcoptic mange, social behavior, survival, thermal imagery cameras, thermal imaging, wildlife species, wolf, wolf discovery center, wolves, yellowstone national park

Psychedelically colored wolves depicted by thermal imaging will shed light on how mange affects the survival, reproduction and social behavior of wolves in Yellowstone National Park.

About a quarter of the wolf packs in the park are afflicted with sarcoptic mange, a highly contagious canine skin disease caused by mites that burrow into the skin causing infections, hair loss, severe irritation and an insatiable desire to scratch.

The resulting hair loss and depressed vigor of the wolves leaves them vulnerable to hypothermia, malnutrition and dehydration, which can eventually lead to death, said Paul Cross, a U.S. Geological Survey disease ecologist, who leads the project along with Doug Smith of Yellowstone National Park. (more…)

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