A Guide to California's
Reptiles and Amphibians
Sounds of
Green Treefrog - Hyla cinerea
Schneider, 1799
(Dryophytes cinereus)
| Advertisement Calls An advertisement call is the most well-known call of a frog. It is produced by a male frog in order to attract females during the breeding season and to warn other rival males of his presence. Frogs usually make the calls around bodies of water that are suitable for breeding and egg laying. These calls can be heard during the evening and at night, and sometimes during daylight at the peak of the breeding season. The advertisement call of the Green Treefrog is a loud abrupt nasal honk or bark, repeated up to 75 times per minute, though it is commonly described as a loud bell-like sound (the origin of the common names "Bell Frog" and "Cowbell Frog"). |
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 This is a 24 second recording of the advertisement calls of a close Green Treefrog recorded at dusk in July in Fairfax County, Virginia with distant Green Treefrogs and Green Frogs in the background along with Red-winged Blackbirds and an occasional American Bullfrog. (shown on the right.) |
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| This is a 90 second recording of the mixed advertisement calls of a large group of Green Treefrogs and Green Frogs, and a few American Bullfrogs made at dusk in Fairfax County, Virginia in July (shown on the right.) |
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| This is a recording of a couple of Green Treefrogs made at night in Chambers County, Texas. A Green Frog a Pig Frog are occasionally heard in the background. (shown on the right.) This is a 30 second recording of some very excited fast-calling Green Treefrogs made at night in Chambers County, Texas. (shown on the right.) |
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| This is a 3 second recording of the advertisement calls of a Green Treefrog recorded at night in June in Travis County, Texas (shown on the right.) Great Plains Narrow-mouthed Toads are heard in the background. This is a 20 second recording of the advertisement calls of a few Green Treefrogs recorded at night in June in Travis County, Texas (shown on the right.) Insects are heard in the background. |
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