Posts Tagged ‘mating call’

Green Frog (male, calling)

January 11, 2015

I spotted a Green Frog (Lithobates clamitans) along the boardwalk in the hemi-marsh at Huntley Meadows Park on 25 May 2014. This individual is a male, as indicated by the size of its tympanum (eardrum).

Females and males can be differentiated by the size of the tympanum (the eardrum, located behind the eye and below the dorsolateral ridge). In females, it is about the same size as the eye and in males it is much larger than the eye. Source Credit: Northern green frog, a Project Noah spotting by Kara Curtain/Jones, graduate student and teaching assistant at George Mason University, Department of Environmental Science and Policy.

Tech Tip: The preceding video looks better viewed in full-screen mode.

Related Resources: Some species of amphibians, such as Spring Peeper (Pseudacris crucifer), are heard more often than seen. In 2014, I resolved to learn the calls of many of the amphibians that are common at Huntley Meadows Park. The following alphabetical list provides quick links to audio recordings of several species of frogs and toads of Virginia, courtesy Virginia Herpetological Society.

Test your skill in identifying frog calls by visiting the USGS Frog Quizzes Web page. Be forewarned: The quizzes are challenging! Refer to Virginia is for Frogs for more frog-related resources including Teacher’s Corner, featuring ideas for lesson plans and activities.

Copyright © 2015 Walter Sanford. All rights reserved.

Toad-ally in love! (Part 1)

April 20, 2014

The wetlands are alive, with the sound of trilling! Yep, either I’m channeling Julie Andrews from The Sound of Music or it’s mating season for toads in the mid-Atlantic region of the United States of America.

The mating process begins when male toads, such as the following Eastern American Toad (Anaxyrus americanus), go to a body of water and begin calling females. This individual was spotted on 12 April 2014 in a large vernal pool located near the terminus of the Hike-Bike Trail at Huntley Meadows Park.

American Toad (Anaxyrus americanus)

The following movie shows a male toad calling several times. The mating calls of other male toads can be heard in the background, as well as wind noise (the video clip was recorded on a windy day).

Editor’s Note: This is Part 1 in a five-part series of posts featuring two types of toads commonly seen at Huntley Meadows Park: Eastern American Toads (Anaxyrus americanus); and Fowler’s Toads (Anaxyrus fowleri).

Related Resources:

Copyright © 2014 Walter Sanford. All rights reserved.

Southern Leopard Frogs (mating pair)

March 8, 2012

A mating pair of Southern Leopard Frogs (Lithobates sphenocephalus) spotted during a photowalk through Huntley Meadows Park, Fairfax County, Virginia USA. The male is the smaller of the two frogs, positioned on top of the female. Notice the difference in coloration between the male- and female frog. Photo 3 of 5 is a cropped version of Photo 2; Photo 5 of 5 is a cropped version of Photo 4.

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Related Resource: Audioboo of frog mating calls, recorded shortly before the photos were taken.

Photos and audio Copyright © 2012 Walter Sanford. All rights reserved. www.wsanford.com


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