Tag Archives: Frogs

Amphibians on the Move!

As temperatures rise, spring rains roll in, and the ground thaws, the amphibians of New York are preparing themselves for a great migration. On the 10th of March, a group of about 30 volunteers congregated near Hop Field at Thacher State Park armed with flashlights and buckets. With great excitement they looked along the road edges for salamanders and frogs, hoping to help them cross the road as the amphibians migrated to woodland pools. Throughout most of the year, mole salamanders and woodland frogs spend their time burrowed under rocks and leaves on the forest floor, but each spring salamanders and frogs can migrate up to a quarter mile to woodland pools to breed. The mass migrations to the vernal pools occur during spring rainstorms with temperatures above 40 degrees.

The rain was intermittent that night, and although spring peepers and leopard frogs were escorted across the road, no salamanders were found. The migrations typically happen in late March and early April, so there is still hope! On nights when the conditions are right, many nature enthusiasts can be seen on roadways close to wetlands helping the amphibians safely cross the road. If you are interested in getting involved in preventing vehicle related deaths during these mass migrations, contact your local State Park or local DEC office. These organizations sometimes coordinate volunteers to come together on rainy nights to help salamanders cross busy roads. The more volunteers there are to help, the more amphibians will successfully breed! Before you help the amphibians, be sure to brush up on your identification! Here is a sampling of the native amphibians that you could see in New York.

Mole Salamanders:

Blue Spotted
Blue spotted Salamander, By Greg Schechter [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)%5D, via Wikimedia Commons
The blue spotted salamander is black with pale blue flecks all over its body. It can grow from 3.5 to 5.5 inches long. They are frequently seen in woodlands.

The spotted salamander is black and has yellow spots. It can grow up to 8 inches long. It is one of the most common salamanders in the area, and if you go out on a migration night there is a good chance that you will see it!

Jefferson salamander
Jefferson Salamander, By Unspecified (Vermont Biology Technical Note 1) [Public domain], via Wikimedia Commons
The Jefferson salamander is dark brown and has pale blue spots on its limbs and lower sides. The blue speckling is best seen on younger salamanders. It can crossbreed with the blue spotted salamander and usually grows to 4.5 to 7 inches long.

Red eft
Red Eft, By Jason Quinn (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)%5D, via Wikimedia Commons
This red eft/ red spotted newt can secrete poisonous toxins. When it is on land in its juvenile stage, it is orange. However, in its aquatic adult stage it is an olive brown color and has a wide paddle like tail.

Frogs:

Wood Frog
Wood Frog, By USFWS Mountain-Prairie (Wood Frog) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)%5D, via Wikimedia Commons
The wood frog has an extremely high freeze tolerance and can live in a variety of habitats including forests, tundra, and bogs. It has the nickname “Lone Ranger” because the coloration on its face resembles a mask. Last year a bill was proposed by a class of 3rd graders to declare the wood frog the State Amphibian of New York. To see the bill’s progress check out this website.

Peeper
Spring Peeper, By Justin Meissen [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)%5D, via Wikimedia Commons
The spring peeper has large vocal sacs that it uses to create high pitched tones during the spring mating season. It typically grows to about one inch long and has a dark X marking on its back. Listen to the call of a male spring peeper.

Leopard frog
Leopard Frog, By Douglas Wilhelm Harder (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)%5D, via Wikimedia Commons
The leopard frog gets its name from the irregularly shaped dark patches on its legs and back and can grow to be 3 to 5 inches long. They were once the most abundant frog species in North America, but they suffered large population declines in the 1970s.

Recommended Links:

Salamander Migration Extraordinaire” Check out this naturalist’s blog post  that has videos of spotted salamanders and Jefferson salamanders migrating to a vernal pool. There is amazing underwater footage of the salamanders at the breeding site!

Check out this video of Ranger Eric Powers from Your Connection to Nature to learn more information about vernal ponds and the animals that rely on them!

Post written by: Emily Crampe, SCA Member, Thacher State Park

Sources for text:

http://www.vernalpool.org/inf_mol.htm

http://www.dec.ny.gov/lands/82722.html

http://animals.nationalgeographic.com/animals/amphibians/northern-leopard-frog/

https://www.michigan.gov/dnr/0,4570,7-153-10370_12145_12201-32988–,00.html

 

Spotting the Leopard Frog

The discovery of a new species is always a big deal, especially when it’s been living right under the noses of over 8 million residents of New York City and the surrounding counties. A new species of leopard frog, still unnamed,  was first identified by Jeremy A. Fienberg of Rutgers University in 2009 on Staten Island, and DNA tests confirmed his discovery in 2012.

The deceptively similar northern leopard frog (Rana pipiens), by M. Schlesinger
The deceptively similar northern leopard frog (Rana pipiens), by M. Schlesinger

It’s no mystery how this mystery frog escaped our notice for so long. There are over a dozen leopard frog species that range between Canada and Central America, and until Fienberg recognized their distinctly different vocalizations, all the leopard frogs of NY were presumed to be either northern leopard frogs (Rana pipiens), or southern leopard frogs (R. sphenocephala).

New York State Parks is collaborating with the NY Natural Heritage Program on a regional study aimed at defining the range of the newly described species in comparison to the northern and southern leopard frog. The study’s objectives are to define the distribution, habitat use, and conservation status of the three species from Rhode Island through Virginia by matching calling surveys with follow-up surveys to catch, photograph, and get tissue samples from frogs. In New York, efforts are focusing on the Hudson Valley and Long Island, where State Parks contain some large wetlands that may be suitable as leopard frog habitat.

As part of this project, Natural Heritage biologists Kelly Perkins, Rich Ring, and Matt Schlesinger, and Parks biologist Jesse Jaycox, conducted surveys and habitat assessments for leopard frogs at wetlands in state parks. These surveys were conducted at Goose Pond Mountain, Tallman Mountain, Franklin D. Roosevelt, and Taconic State Parks. Despite spending long evenings in the parks at night, when frogs are most active, no leopard frogs were found. However, these wetlands are home to many other types of frogs, including Green Frogs (R. clamitans), spring peepers (Pseudacris crucifer), wood frogs (R. sylvatica), and pickerel frogs (R. Palustris).

For now, this new species remains a cryptic member of New York’s natural wildlife. Hopefully, we’ll get to know it better in the future.

Swamp_South_of_Purgatory_Road_Aug08_2
A swamp in Orange County where the new species makes its home. By M. Schlesinger

The featured image is the unnamed species of leopard frog, by Matt Schlesinger. Post by Matt Schlesinger and Paris Harper.

Update: The newly discovered leopard frog species has been named the Atlantic coast leopard frog, Rana kauffeldi.

Salamander Migrations

Salamander migrations are annual events that happen within a very short time frame every year. Salamanders are cued to specific temperature, humidity, air pressure and light conditions which signal to them that it is safe to travel. This typically occurs on the first rainy night above 45°F in the late winter or early spring. Although the salamander migration often occurs on one big night, this year’s inconsistent weather led to a series of smaller salamander movements that were staggered across a few weeks.

Salamanders belong to the group of animals called amphibians, which all share the ability to breathe through their skin. For this reason their skin must remain damp at all times, which is why rainy conditions are necessary for any long-range movement across land.

When salamanders migrate, they are moving away from their overwintering spots in wooded upland areas to vernal pools in lowland areas and depressions. Vernal pools are temporary pools created by spring rain and snow melt that dry up by mid-summer. Predators like fish and turtles cannot live in vernal pools, and so they are a strategic habitat for salamanders to breed and lay their eggs.

Once they have arrived at the vernal pool, male salamanders perform courtship dances to attract mates. Once they have paired off, the males deposit sperm packets on the twigs and leaf litter in the pond, which the females pick up and use to fertilize their eggs, which are laid underwater in groups of 100-300. On the next warm, wet night the adults will relocate to their summer habitats – usually a cozy spot underneath a rock or log.

Salamanders are extremely vulnerable during migration events, especially when their routes require them to cross roads. Many State Parks organize volunteer groups to meet on these special nights to act as amphibian crossing-guards. A few weeks ago, some friends and I took a slow night drive on the county roads near Thacher State Park in Albany County to see if we could help any salamanders on their journey. We saw plenty of salamanders, and frogs, too!

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featured image is a spotted salamander. Photos and post by Paris Harper