Mating Songs of Frogs
Paragraph 1: The calling or singing of Frogs plays an important role in their reproduction — specifically, in helping individuals find and select mates. Sound has many advantages as a communication signal. When sounds are broadcast, the auditory receptors do not need to be in a particular orientation relative to the sound source in order to receive stimulation. Loud songs, particularly those made by choruses of Frogs calling together, can travel long distances and thus attract distant Frogs. Sounds travel around large obstacles. These advantages are not found in the visual modality: here the receiver must be attentive and have its visual receptor orientated in the correct direction. Further, most Frogs and toads breed at night, when light levels are low but sounds can be easily localized. We can conclude that auditory signals are used by Frogs and toads because they can be effective over long distances at night.
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