In the U.S., frogs and toads are beginning to wake up from their winter hibernation and soon we’ll be hearing the calls of spring as the amphibian breeding season begins. This a great time to become a Frog Watch USA volunteer, where you will make a commitment to monitor a local site for 3 minutes at least twice a week throughout the breeding season.
You don’t have to be an expert to become a volunteer, but you might find it helpful to attend a Frog Watch training session hosted by zoos, aquariums, and conservation organizations nationwide. Here’s a list of the upcoming training sessions:
Connecticut Yale Peabody Museum of Natural History March 16, 2012; 6:00-8:00 pm
March 20, 2012; 6:00-8:00 pm
Florida Brevard Zoo April 11, 2012; 4:30-8:30 pm
April 14, 2012; 4:30-8:30 pm
May 23, 2012; 4:30-8:30 pm
June 20, 2012; 4:30-8:30 pm
July 25, 2012; 4:30-8:30 pm
August 22, 2012; 4:30-8:30 pm
August 25, 2012; 4:30-8:30 pm
Santa Fe College Teaching Zoo, Gainesville, FL
March 17, 2012
Tampa’s Lowry Park Zoo April 5, 2012; 6:30-8:30 pm (volunteer training)
May 3, 2012; 6:30-8:30 pm (call identification and certification)
June 7, 2012; 6:30-8:30 pm (volunteer training)
July 5, 2012; 6:30-8:30 pm (call identification and certification)
August 2, 2012; 6:30-8:30 pm (end-of-season wrap up/pot luck)
Indiana Fort Wayne Children’s Zoo March 13, 2012; 5:30-9:30 pm
March 17, 2012; 1:00-5:30 pm
Monroe County Parks and Rec March 22, 2012; 6:00-9:00 pm
Michigan Detroit Zoo March 11, 2012; 1:00-4:00 pm
March 18, 2012; 1:00-4:00 pm
Missouri Saint Louis Zoo March 24, 2012; 10:00 am-12:30 pm
March 28, 2012; 7:00-9:00 pm (certification)
New Jersey Jenkinson’s Aquarium March 21, 2012; 6:00-8:00 pm
Rhode Island Roger Williams Park Zoo March 24, 2012; 10:00am-12:00 pm
April 12, 2012; 6:00-8:00 pm
Tennessee Chatanooga Zoo March 31, 2012
Utah Utah’s Hogle Zoo March 17, 2012; 2:00-4:00pm
Virginia Virginia Zoo, March 18, 2012; 5:00pm
At a recent training session at the Lynchburg (VA) Public Library, for example, volunteers listened to the calls and then tried to connect them to a recognizable sound. Here’s one of the frog calls these volunteers tried to identify. Does the call of this Pickerel frog sound to you like a squeaky door – or like a snore?
We’re happy to feature this guest post by Meghan Bartels from the Panama Amphibian Rescue and Conservation Project in celebration of leaping frogs. Don’t miss the wonderful song below by Alex Culbreth.
The real purpose of leap day may be to keep the calendar aligned with the seasons, but here at the Panama Amphibian Conservation and Rescue Project, we’d like to believe the day is designed to honor our favorite leapers. To celebrate, we’ve put together some fun facts about frog leaping.
Frog Leaping courtesy Brian Gratwicke & Panama Amphibian Rescue and Conservation Project
Not all frogs can leap, or even hop. The desert rain frog (Breviceps macrops) has legs that are too short to hop. Instead, it walks.
Male frogs of the genus Pipa are known to defend their territory by jumping at and then wrestling other males.
The New Guinea bush frog (Asterophrys turpicola) takes jump attacks one step further: before it jumps at a strange frog, it inflates itself and shows off its blue tongue.
Stumpffia tridactyla are normally slow-moving critters, but when they’re startled they can abruptly jump up to 8 inches. That doesn’t sound very far, but these little guys are less than half an inch long!
The Fuji tree frog (Platymantis vitiensis) may be the leaping stuntman of the frog world. Each time it leaps, it twists in the air—sometimes even 180 degrees—to throw predators off its trail.
The Larut torrent frog (Amolops larutensis) gets its name from a nifty leaping trick: it can jump into a fast-moving stream and back to its usual perch, the underside of a rock, without being affected by the current.
Similarly, the parachuting red-eyed leaf frog (Agalychnis saltator) gets its name because it speeds to mating opportunities by jumping from trees with finger-and toe-webbing spread wide.
The record for longest jump by an American bullfrog (Rana catesbeiana) recorded in a scientific paper is a little over 4 feet. But scientists who went to the Calaveras County Fair, which Mark Twain’s short story made famous for frog jumping, found that more than half the competitors bested that record—and one jumped more than 7 feet in one leap!
The Guinness Book of World Records doesn’t include any frogs for their leaping ability. But it does track human performance in frog jumping (jumping while holding one’s toes). There are records listed for the longest frog jump and the fastest frog jumping over 10 and 100 meters.
In honor of leap day celebrations being coordinated globally by Amphibian Ark, the Panama Amphibian Rescue and Conservation Project made this video for a frog song written by Alex Culbreth.
We were happy to receive a guest post from Alicia Moore about how to teach children about amphibians. Alicia has always loved to learn and is working toward earning a teaching degree. She is particularly interested in how the advent of the Internet and technology are changing the educational landscape. When she is not exploring the future of education, Alicia enjoys writing about literature, languages, and online resources for teachers.
While it may sound surprising, the greatest threat to any animal on the planet is mankind. Humans are perched solidly at the top of the food chain, and our nation’s youth must understand the incredible responsibility that comes with that power. This responsibility, however, doesn’t end at protecting magnificent animals like tigers and whooping cranes. Even little creatures like amphibians are worthy of our help. Luckily, you can easily teach kids about endangered or threatened frogs and amphibians by talking openly with your students about the threats frogs face and what can be done to help them.
According to the National Wildlife Federation, nearly thirty percent of all the amphibians in the world are facing extinction. Many frogs species live in the United States, and you can easily teach your students about the choices made by man that have resulted in the near destruction of these animals. You can also discuss the fact that the damage has not always been intentional, making it even more important for people to carefully consider the full consequences of their choices on the environment.
One example is the Sierra Nevada yellow-legged frog, which has seen a 90 percent drop in numbers in recent years. Part of the problem has been pesticides that wash in from surrounding farms and private properties. Suggesting that people quit using chemicals on their yards may land you in trouble with parents, but you can safely mention that there are environmentally-friendly options available for lawn care. Another issue harming the Sierra Nevada frog is the introduction of non-native trout to the lakes these frogs once called home. As the trout population has exploded, the frog population has plummeted. This provides your students with a clear example of why critters from one area should not be moved to another.
Sierra Nevada Yellow-legged frog, Courtesy of UC Berkeley, www.crcd.org
Another is the dusky gopher frog, which could once be found along the Gulf Coast from Alabama to Louisiana. Over the years, this frog’s territory range has decreased so much that it is now only found in a few breeding ponds located in southern Mississippi. The biggest challenge faced by these frogs is that they depend on the burrows created by gopher tortoises to survive, but these animals are also an endangered species. Thus, these frogs serve as a prime example of the circle of life, cascading results, and unintended consequences. As one seemingly insignificant animal is driven to extinction, another animal that depended on it will also perish.
Gopher frog, courtesy of Tennessee Watchable Wildlife, tnwatchablewildlife.org
There are also a few success stories among the endangered species of amphibians. The National Wildlife Foundation reports that the Amargosa toad is one such example. The Amargosa toad depends on springs and ponds in the Oasis Valley of Nevada. Most of these highly valued water resources are privately owned, a fact that could severely hamper conservation efforts. However, landowners in the region have willingly worked with wildlife agencies to preserve or create and maintain the toads’ habitats. The partnership has resulted in positive results for the toad, and the realization that private owners and conservation groups can work hand-in-hand to prevent the extinction of animals. This is a valuable lesson for students, as it teaches them to find ways to work together for the greater good and the benefit of creatures who are at man’s mercy.
Amargosa toad, courtesy of the U.S. Fish and Wildlife Service
These are just a few examples that you can use to teach students in the classroom about amphibians and the importance of protecting them. These critters are all native to different regions of the United States, and you can find wonderful pictures of them at the National Wildlife Federation’s website. The lessons can easily focus on habitat protection, not moving animals from one environment to another and finding ways to work as a team to help the animals.
Keep in mind that it may be hard for your students to understand why frogs matter in the beginning. There may be many jokes about how slimy they are, and depending on the grade level, there may even be jokes about having frog legs for dinner. As a result, you must be prepared to teach your students about the importance of frogs and amphibians. You can find a variety of lesson plans and materials online, such as this one: Frog Unit Study: Hopping to Learn. Likewise, The Amphibian Rescue and Conservation Project is another excellent resource that can help you explain the importance of frogs to your students.
If your students would like to get actively involved, you can provide them with an opportunity to do so as a class. In fact, PBS even has a website, Give and Get Back!, dedicated to volunteering and offering suggestions for how children can get more involved and make a difference. This site can help you and your students turn the concept of volunteering and making a difference into a concrete reality.
The first step in educating students about endangered amphibians is to show them the pictures available online and talk to them about why the creatures are now struggling to survive. It’s important to connect the dots between the actions of man and the unintentional habitat destruction that can result. It’s important for children to know how different actions by humans could have resulted in a more favorable outcome for the creatures.
This morning at the library I found a recently published book called FROGS: The Animal Answer Guide by herpetologists Mike Dorcas and Whit Gibbons (Johns Hopkins University Press, 2011). The book is structured in the form of questions and answers, helping readers gain insight into amphibians and raising awareness about the importance of frogs and toads in our natural world.
FROGS: The Animal Answer Guide by Mike Dorcas and Whit Gibbons
Here are some questions posed in the book:
Do frogs sleep?
What color are a frog’s eyes?
How do some frogs stick to walls?
Why should people care for frogs?
What roles do frogs play in native cultures?
Do frogs have teeth?
The answers are easy to read and non-technical. While the book wasn’t shelved in the children’s room, it would be fine for kids ages 10 and up.
So here’s one question from the book:
How far can a frog jump?
Many frogs can jump at least 30 times their body length, and some smaller species of tree frogs can jump 50 times their length. This is the human equivalent of jumping the length of a football field without a running start. Some frogs in the genus Rhacophorus, flying or gliding frogs of Asia, can go even longer distances. These frogs have webbed toes that they use as parachutes to slow their fall and glide from one tree to the next, or to the ground. Jumping helps frogs avoid predators; the skeletons of some species are modified to absorb the shock when they land. Not all frogs are long jumpers. The narrowmouth toads of the southeast and or the Mexican burrowing toad can only hop a few inches.
Yesterday while shopping at the mall, I noticed that some stores had already begun putting up holiday decorations. The racks were filled with sweaters and down coats. We humans (at least in the northeast U.S.) are preparing for winter. But what about our amphibian friends? How do they prepare for winter? After all, frogs would seem vulnerable to extreme cold with their thin skins and their need to constantly stay moist.
Actually, we don’t need to worry about the frogs. They are well-equipped to deal with the cold weather, even with Arctic temperatures.
Frogs are ectothermic, which means that they rely on their environment to regulate their body temperature. Birds and mammals, including humans, are endotherms. We generate heat chemically and internally by breaking down food. The bodies of ectotherms reflect the air, ground, and water temperatures around them. One advantage that ectotherms have over mammals is that they can survive for long periods without eating.
In the fall, frogs first need to find a place to make their winter home, a living space called a hibernaculum that will protect them from weather extremes and from predators. The frog then “sleeps” away the winter by slowing down its metabolism. When spring arrives, it wakes up and leaves the hibernaculum, immediately ready for mating and eating.
Aquatic frogsand toads such as the leopard frog and American bullfrog usually hibernate underwater in streambeds or on pond bottoms. Because aquatic frogs need oxygen, they lie just above the mud, or only partially buried in the mud, so they are near the oxygen-rich water. They may even occasionally slowly swim around.
Terrestrial frogs and toads typically hibernate on land. Those frogs and toads that are good diggers like the American toads burrow deep into the soil, safely below the frost line. Other frogs, such as the wood frog and the spring peeper, aren’t good diggers and so must scout out their winter homes in deep cracks and crevices in logs or rocks, or they might dig down into the leaf litter.
These frozen peepers and wood frogs might look dead; their hearts have actually stopped beating. But the partially frozen frogs aren’t dead. Instead, they have a kind of natural anti-freeze in their bodies. Ice crystals form in their organs and body cavity, but a high concentration of glucose in the frogs’ vital organs prevents freezing. When spring approaches and its hibernaculum warms up above freezing, a frog’s frozen body will thaw, and it will come back to life.
As you go about preparing for winter, think of the frogs with their amazing adaptations for survival, safe in their winter homes, waiting for spring.
Here’s a video from YouTube about the hibernation of a wood frog. It’s pretty amazing—take a look!
This is a partial repost of an earlier post from December 2010. Most of the information from the post came from an article in Scientific American, How Do Frogs Survive the Winter?by Rick Emmer.
It’s back-to-school time again, a time when teachers may be planning their life science classes. What better way to illustrate an animal’s life cycle than by teaching kids about the remarkable transformation of a tadpole into a frog? Unfortunately teachers may decide to use grow-a-frog kits to teach children about metamorphosis.
I have to admit I have mixed feelings about advising teachers not to raise live amphibians in the classroom. As a child, my love of animals was fostered by the various animals I kept at home, including fish and turtles. I probably would have enjoyed having a live frog in the classroom.
But the authors of an article in the Herpetological Review, “Considerations and Recommendations for Raising Live Amphibians in Classrooms,” remind us that the world is no longer a simple place: innocent acts like catching tadpoles and releasing them later into local ponds are much more complicated than they used to be.
Releasing live frogs “grown” in the classroom into the wild can potentially harm native amphibians (even if the animals are native to the area) by possibly spreading infectious diseases, such as the deadly chytrid fungus, a disease that has wiped out entire frog populations. It may also introduce species (such as bullfrogs) that might become invasive and disrupt local amphibians.
After we wrote a few posts discouraging people from buying the Frog-o-Sphere kits, quite a few readers who owned the kits were distressed and emailed us, asking if they should “let the frogs go.” We wrote back immediately, telling them not to release the frogs into the wild. Instead we referred them to frog care sites and books. If you’ve already purchased a frog kit, it is your responsibility to take care of the frog. Releasing it into the wild helps neither the frog nor the environment.
The problems with the classroom grow-a-frog kits are similar. After the tadpole grows into a frog, the children may become bored with it and the teacher may decide to release it into a local pond. Or at the end of the school year, the teacher may give it to a family, who then releases it somewhere in the neighborhood. As advised in the article above: “This should never be done, and in fact, it is illegal in several states. No amphibian purchased or received from any commercial or informal (e.g., a neighbor) source may be released into the wild. This recommendation applies whether the species is technically ‘native’ to the region of release, or not.”
If you decide to purchase a grow-a-frog kit (which we hope you don’t), you will be making a commitment to take care of the frog for its natural lifespan.
How can teachers and parents teach children about the life cycle of frogs without raising live frogs? We would suggest contacting a local nature center and setting up a field trip in the spring, where the children can see eggs and tadpoles in the wild. This past spring while hiking I frequently saw frog egg clusters in ponds and swamps, and it’s fairly easy to see tadpoles as well. A local naturalist will know where to look.
To prepare the children for what they might see in the spring, here are some resources:
The Amphibian Project : Classroom curricula, field projects and hands-on activities, fundraising ideas for students, and links.
Amphibians. 35 min. (Eyewitness DVD) Describes amphibian life cycle and anatomy; behaviors and adaptations; and amphibian characteristics. Grades 5-12
The authors of the article above recommend this pamphlet, produced by Partners in Amphibian and Reptile Conservation (PARC) entitled “Don’t Turn it Loose.”
