purr articles
What sound is commonly associated with amphibians in cartoons but is inaccurate for many species?
How is the vocalization of the common frog (*Rana temporaria*) during the breeding period primarily described?
What anatomical feature is responsible for drastically amplifying the initial sound waves generated by a frog's vocal cords?
What visual change occurs in the throat of a male common frog during the peak of its purring vocalization?
What characteristic sound is attributed to the Pickerel Frog (*Rana palustris*)?
What is the signature sound of the American Bullfrog often transliterated as?
When a toad was observed 'purring like a cat' while being handled, how was this vocalization interpreted by experts in the community?
What sound does the Spring Peeper (*Pseudacris crucifer*) use as its primary advertisement call?
How does the biological mechanism of the amphibian's purr contrast with feline purring?