![File:Eleutherodactylus martinicensis with external vocal sac - journal.pone.0022080.g001B.png - Wikimedia Commons File:Eleutherodactylus martinicensis with external vocal sac - journal.pone.0022080.g001B.png - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Eleutherodactylus_martinicensis_with_external_vocal_sac_-_journal.pone.0022080.g001B.png/640px-Eleutherodactylus_martinicensis_with_external_vocal_sac_-_journal.pone.0022080.g001B.png)
File:Eleutherodactylus martinicensis with external vocal sac - journal.pone.0022080.g001B.png - Wikimedia Commons
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The Natural History of Model Organisms: The big potential of the small frog Eleutherodactylus coqui | eLife
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The Natural History of Model Organisms: The big potential of the small frog Eleutherodactylus coqui | eLife
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Male Common Coqui vocalizing (Eleutherodactylus coqui) El Verde, El Yunque National Forest, Puerto Rico - SuperStock
![Santi Ron on Twitter: "@AmphibianPhil @jodirowley @AmphibiaWeb Yes, amazing and characteristic of Trachycephalus. This is T. jordani. http://t.co/bTdgInrBqq" / Twitter Santi Ron on Twitter: "@AmphibianPhil @jodirowley @AmphibiaWeb Yes, amazing and characteristic of Trachycephalus. This is T. jordani. http://t.co/bTdgInrBqq" / Twitter](https://pbs.twimg.com/media/CD1SrulWMAMtSJL.jpg)