Creature Features (61)
SELC settlement protects blue-blood horseshoe crabs and their avian dependents
Red Knot.
Chuck Homler
CHARLESTON — A landmark settlement prohibits horseshoe crab collection on the beaches of more than 30 islands along the South Carolina coast that are established feeding sites for rufa red knots during their annual migration — as well as any harvesting in Cape Romain National Wildlife Refuge — for at least five years.
Every spring, red knots time their 9,300-mile migration from South America to the Canadian Arctic perfectly so they stop on the same beaches of South Carolina at the exact moment horseshoe crabs begin to spawn.
These protein-rich crab eggs are critical for red knots, providing the fuel they need to complete their transpolar journey. This delicate relationship between horseshoe crabs and red knots has developed over millions of years.
Butterfly release scratched at UT Arboretum festival after pushback on ecological wisdom
Written by Thomas FraserCome join the fun at the annual UT Arboretum Society Butterfly Festival from 10 a.m to 1 p.m on September 9 at the UT Forest Resources AgResearch and Education Center and Arboretum. The event will include educational activities about protecting these pollinators. Photo courtesy University of Tennessee Institute of Agriculture
UT grounds planned butterfly release but festival will fly
OAK RIDGE — The University of Tennessee Arboretum canceled a planned release of painted butterflies originally scheduled for its upcoming annual butterfly festival, but the pollinator-positive educational event will go on to the joy of families and nature enthusiasts across East Tennessee.
“While the fun-filled and educational event is still scheduled for Sept. 9, a mass release of painted lady butterflies is no longer scheduled as part of the event,” according to the UT Arboretum Society.
The 8th annual festival will occur from 10 a.m. to 1 p.m. at the UT Forest Resources AgResearch and Education Center and Arboretum, 901 S. Illinois Avenue, Oak Ridge. Plenty of activities will provide educational opportunities for the public to learn how we can all protect our pollinators, according to the UT Institute of Agriculture.
“The butterfly species previously planned for release at the festival was the painted lady, Vanessa carduii. Butterfly releases have been held at past festivals with the intention that the more people understand an organism, the more they are inspired to help protect it. Though there has not been definitive scientific research about the impact of painted lady butterfly releases, the UT Arboretum Society has decided to join many other scientific organizations, such as the North American Butterfly Association and the Smithsonian Institute, in not promoting this practice,” according to a release.
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Virginia Tech Professor Bill Hopkins preparing to gently return a hellbender to its underwater home in a Virginia stream after taking measurements. Lara Hopkins/Virginia Tech
One clue: They eat their own in deforested stream corridors
Mike Allen is a media relations officer for Virginia Tech.
BLACKSBURG — The gigantic salamanders known as hellbenders, once the apex predators of many freshwater streams, have been in decline for decades, their population constantly shrinking. No one knew why. William Hopkins, professor in the Department of Fish and Wildlife Conservation and director of the Global Change Center at Virginia Tech, suspected the hellbenders’ plight had connections with environmental changes engineered by humans.
Hellbender males select nesting sites on stream bottoms and guard the eggs laid there by females — and occasionally the salamander dads snack on the eggs, consuming them before they ever get to hatch. A study that Hopkins led, conducted through eight years of snorkeling in ice-cold Southwest Virginia streams and published in The American Naturalist, determined that in deforested areas, hellbender fathers are far more likely to eat their entire brood than in areas that still have lush foliage.
This behavior, known as filial cannibalism, probably evolved as a survival tactic for enduring harsh conditions. Prior to Hopkins’ results, scientists were not aware that hellbenders’ filial cannibalism drastically increased in cleared lands, actively speeding the species out of existence.
Opposition mounts to Pisgah/Nantahala national forest management plans
ASHEVILLE — An alliance of conservation groups notified the U.S. Forest Service of its intent to sue the federal department unless officials fix what it calls glaring deficiencies in the Nantahala-Pisgah Forest Plan.
Potential plaintiffs allege the Forest Service’s management plan for the Nantahala and Pisgah national forests is flawed. They maintain the Forest Service plan favors commercial logging, ignores the best science available, and puts several endangered bat species at risk of extinction.
The endangered species potentially affected are the northern long-eared bat, Indiana bat, Virginia big-eared bat, and the gray bat. Two species that are being considered for the endangered species list — the little brown bat and the tricolored bat — would also be adversely affected.
MountainTrue, its lawyers at the Southern Environmental Law Center, and coalition partners — the Sierra Club, The Wilderness Society, Defenders of Wildlife, and Center for Biological Diversity — sent a 60-day Notice of Intent to Sue (NOI), which is a prerequisite to filing a lawsuit under the Endangered Species Act. The letter alleges the Forest Service relied on inaccurate and incomplete information during the planning process, resulting in a plan that imperils endangered wildlife.
A green floater mussel (Lasmigona subviridis). Ryan Hagerty/USFWS
WASHINGTON, D.C. — The green floater, a freshwater mussel native to the waters of Southern Appalachia, is now formally considered at risk of extinction due to the loss and fragmentation of its aquatic habitat.
The U.S. Fish and Wildlife Service determined the green floater, historically found in 10 eastern U.S. states, is likely to become endangered due to existing and emerging threats. The service is proposing to list the mussel as threatened under the Endangered Species Act.
The green floater is still found in its native range in North Carolina, Tennessee, Virginia and West Virginia. It is considered locally extinct in Alabama and Georgia.
While the species has strongholds in places, green floaters are rare in nearly 80 percent of the watersheds where they naturally occur. More than 75 percent of the nation’s native freshwater mussel species are endangered or threatened, considered to be of special conservation concern, or presumed extinct, according to USWFS.
Four-toed salamanders were among the animals included in ORNL research to limit roadkill on the reservation and elsewhere. Bryce Wade/ORNL
The 32,000-acre reservation serves as a vast laboratory for wildlife-protection efforts
Stephanie Seay is a senior science writer and communications specialist in the ORNL Communications Division.
Oak Ridge National Laboratory researchers developed a model framework that identifies ways to ensure wildlife can safely navigate their habitats while not unduly affecting infrastructure.
The project centered on the 32,000-acre Oak Ridge Reservation in Tennessee, home to Department of Energy facilities and several at-risk species like the four-toed salamander.
Scientists identified habitats and simulated solutions like conservation buffers and open-bottom culverts to allow safe passage for salamanders and other wildlife, which cost far less than large-scale barrier removal and similarly boost ecological connectivity.
“Development and environmental sustainability don’t have to be at odds,” said ORNL’s Evin Carter. “Our collaborative approach with project managers and engineers shows wildlife management can be an integral part of land-use planning without introducing undue cost or delays.”
ORNL doctoral student Bryce Wade said the model also benefited from 30 years of high-resolution data available because of the reservation’s history and management as a National Environmental Research Park.
Orianne Society shakes, rattles and rolls to preserve precious Southeastern snakes
Written by Ray ZimmermanChris Jenkins researches timber rattlesnakes like the one seen here. Courtesy Orianne Society
New film highlights importance of rattlesnakes to the Southern Appalachian environment
Timber rattlesnakes have been demonized for centuries, perhaps to the extent humans are incapable of understanding the snake’s importance to the world.
The Orianne Society determined the apex predator is of vital importance to the Appalachian region, yet the snake is facing tremendous challenges to its survival.
The film “Rattled: Conserving Rattlesnakes in Appalachia — A Conservation Documentary.” introduced those sentiments when it premiered in Atlanta and other locations in Georgia and North Carolina.
Researcher Dr. Chris Jenkins, CEO of the Orianne Society, is behind the story for the film.
Jenkins said timber rattlesnakes are declining across their range from Maine to Texas. Wildlife biologists attribute the decline to “low recruitment,” meaning reproductive rates that fail to replace their population.
A female rattlesnake may live 50 years, though most live only to 30 or 40. Maturity usually requires 10 years, and snakes may only produce young every other year. The broods are small and the mortality rate is high among young snakes. Rattlesnakes that encounter humans are often killed, leaving no successors.
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How a study of so-called “trash birds” revealed conservation clues for urban species
Written by Rebecca HeismanThe Port Authority of New York and New Jersey documented a family of peregrine falcons on the Bayonne Bridge. Port Authority
What city birds around the world have in common
This story was originally published by The Revelator.
Why do some bird species seem to flourish alongside humans, eating our crumbs and nesting in our backyards, while others prefer to live as far as possible from dense human populations?
Monte Neate-Clegg began to ponder the question while attending the American Ornithological Society’s 2019 conference in Anchorage, Alaska. “I was staying at an AirBnB and two of the birds I wanted to see in Anchorage, white-winged crossbills and boreal chickadees, were just in the yard,” said Neate-Clegg, at the time a Ph.D. student at the University of Utah. Although new and beautiful to him, the species are common in Anchorage and so omnipresent they’re typically ignored by residents.
“I started thinking, what is it that makes these ‘trash birds’ here, and not elsewhere?”
Neate-Clegg sounds sheepish about using the pejorative-sounding term “trash bird,” but it’s a phrase commonly used by birdwatchers to refer to species ubiquitous to a given location they cease to become interesting and can become irritating. Classic examples include pigeons in city centers and snack-stealing gulls on beaches.
One man’s trash bird is another’s research query. Neate-Clegg wondered if specific traits make certain species more able to thrive in cities around the world. After joining ornithologist Morgan Tingley at his lab at UCLA as a postdoctoral researcher in 2021, he proposed a lab-wide project in an attempt to answer the question.
The research drew on data providing clues which may eventually reveal a roadmap making our cities more bird friendly.
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American wild turkey populations have recovered from historic lows. TWRA still needs help managing the modern populations. Courtesy Eric Lowery via Tennessee Wildlife Resources Agency
TWRA wants you to help build research on USA’s second bird
NASHVILLE — Benjamin Franklin only joked (we think) about making the wild turkey the national bird, but this summer you can help Tennessee with research on the turkey’s national history and renaissance.
Turkeys and bald eagles both grace the state and Southeast and have a notably parallel history of climbing from dire straits nationwide.
The bald eagle became the national symbol on the U.S. seal in 1782.
Declaration of Independence signer Franklin said he would have preferred a different bird. While he may have been joking, he never lobbied for it publicly. His comments in a letter to his daughter, Sarah, have become infamous.
“For my own part I wish the bald eagle had not been chosen as the representative of our country. He is a bird of bad moral character. He does not get his living honestly. You may have seen him perched on some dead tree, where, too lazy to fish for himself, he watches the labour of the fishing hawk; and when that diligent bird has at length taken a fish, and is bearing it to his nest for the support of his mate and young ones, the bald eagle pursues him, and takes it from him … the turkey is in comparison a much more respectable bird, and withal a true original native of America.”
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Pollinator Pathway signs on the Tennessee Aquarium Plaza in Chattanooga lead guests on a self-guided tour highlighting native plants, pollinator behaviors, and unusual pollinators. Courtesy Tennessee Aquarium
TDOT joins with Tennessee Aquarium to pollinate our pathways
CHATTANOOGA — With their distinctive orange and black patterns, gossamer wings and harrowing 3,000-mile migrations, few insects are as charismatic or beloved as the monarch butterfly.
Just imagine how tragic it would be if they disappeared.
So it was with alarm in 2022 that the world received news that the International Union for Conservation of Nature (IUCN) had declared the monarch an endangered species, citing population numbers that had fallen 80 percent since the 1980s.
Similar anxiety met reports in the mid-2000s of colony collapse disorder. This sudden phenomenon dramatically imperiled the survival of European honey bees, whose activity directly or indirectly affects roughly one of every three bites of food we eat, according to the U.S. Department of Agriculture.
Pollinators are undoubtedly critically important to plants and humans alike, whether they’re investigating our Irises, calling on our Columbine, or buzzing our Blueberry bushes. This week, June 19-25, the world celebrates Pollinator Week, which recognizes the wondrous, vital contributions of butterflies, bees, moths, bats, and other pollinators.
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Help TWRA save our pine snakes
NASHVILLE — If you see a vanishing northern pine snake, biologists with the Tennessee Wildlife Resources Agency (TWRA) want to know.
One subspecies of the pine snake, (Pituophis melanoleucus melanoleucus), lives in Tennessee. The snake is considered “threatened” by TWRA due to habitat loss and fragmentation, road mortality, and humans who kill the snakes because they mistake them for timber rattlesnakes.
Brian Flock, biodiversity coordinator for TWRA, said the reports will help the agency find out about the threatened snakes’ habitat and behavior.
“For years we’ve tried to find them. Because of their secretive nature, they’re hard to find,” he said. “We don’t know in Tennessee where they live, how they move around, those kinds of things.” He said they mostly seem to exist in West Tennessee but have been spotted as far east as Knoxville. TWRA, he said, may use the public’s information to add radio tracking devices to the snakes.
The State of Bats: Grim news for our winged mammals
The big brown bat feeds on beetles, flies, moths, and true bugs, which it catches and eats while in flight. It is widespread across the Southern Appalachians and forages for food by flying slow, straight courses over water, forest canopies, wooded clearings, and around city lights. J. Scott Altenbach via Georgia Department of Natural Resources
North America’s first State of the Bats report gives a sobering outlook for the winged mammals. According to the North American Bat Conservation Alliance report:
- More than half of the 154 known bat species on the continent could face severe population declines over the next 15 years.
- During that time, up to 82 percent of bat species will be negatively affected by climate change, especially extreme drought and temperatures.
- The scope and severity of threats — including habitat loss, wind turbines and the deadly bat disease white-nose syndrome — are increasing.
The news isn’t all bad. The report outlines ways to help and emphasizes the wide-ranging benefits of bats, from improving crop yields to eating insect pests. It also highlights the promise of focused, collaborative conservation efforts.
Case in point, the lesser long-nosed bat was once endangered in Mexico and the U.S. But thanks to international efforts, it is now delisted and recovered in both countries.
The North American Bat Conservation Alliance is another example. The coalition involving the U.S., Mexico and Canada created the 2023 State of the Bats report with Bat Conservation International and others.
“Bats face many challenges and the conservation landscape is increasingly complex,” said Dr. Jeremy Coleman, alliance co-chair and white-nose syndrome coordinator for the U.S. Fish and Wildlife Service. “While there is more to do, the level of international collaboration we have achieved for bat conservation in North America is a bright spot and a cause for optimism going forward.”
— Georgia Department of Natural Resources
In the existential battle between Smokies swine and salamanders, the hogs have the upper hand
Written by Ben PoundsEfforts to eradicate wild hogs, which have a damaging effect on salamanders and other communities in the Great Smokies, have been ongoing with mixed success for decades. National Archives
Researchers quantify the effects of feral hogs on Smokies salamander populations
GATLINBURG — A recent study investigating the relationship between Great Smoky Mountains National Park’s beloved salamanders and its hated hogs concluded that the rooting of feral pigs decreases the abundance and diversity of Smokies salamanders.
Alexander Funk of Eastern Kentucky University said the effects of feral hogs on salamanders from the family plethodontidae were mixed and varied depending on the season.
Generally, across seasons and especially in the summer, the hogs’ foraging seemed to hurt salamander abundance and diversity. Funk is a student under Eastern Kentucky University’s Director for the Division of Natural Areas Stephen Richter but had help from Benjamin Fitzpatrick of the University of Tennessee at Knoxville. The study involved Funk going out late at night on Balsam Mountain in the spring, summer and fall of 2022.
From soil to sky: Will the misty microclimates of the Smokies prevail in a warming world?
Written by Élan YoungWith the help of GPS coordinates and survey flags, Jordan Stark is able to deploy and locate the exact off-trail placement of soil moisture sensors she placed in Great Smoky Mountains National Park as part of her graduate research at Syracuse University. Elan Young/Hellbender Press
Foundational ecology moves from before times to nowadays in the Smokies
GATLINBURG — In the Middle Ages, salamanders were thought to come from fire. A log set on the hearth would send them scurrying out of the rotten wood, startling those who had gathered around for warmth. We now know that salamanders, of course, come from water — even the European fire salamander with its flame-like yellow markings.
Over the last 20 years of getting my boots soggy in Great Smoky Mountains National Park, I know these creatures to thrive in the clean, shallow streams and trickles of this temperate rainforest, where annual precipitation is higher than anywhere in the U.S. save for the Pacific Northwest.
One way to become acquainted with the park is through the water that veins through the hills and is transmuted into vapor that floats on the air in misty silence. After a rain, you can slake your thirst from the pools formed in the creases of broad rhododendron leaves. Sit by a shallow, fishless stream for long enough and you might spot the quick movement of a salamander tail, maybe a flash of orange or brown, or notice a tiny black amphibian face peeking out from behind a smooth stone in the creek.
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- clemson department of biological sciences