Scientists suggest female frogs listen for changes in the male calls as a signal for when it's warm enough to mate.
Male green treefrogs attract mates with loud calls, but new research shows parasites can subtly change those signals.
A Pacific tree frog (Pseudacris regilla) male calls at Washington state's Conboy Lake National Wildlife Refuge. Cyril Ruoso, Nature Picture Library When ice and snow begin to melt in California's high ...
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