The concave-eared torrent frog could give opera divas a run for their money. Reaching a pitch in the ultrasonic range, these frogs perform arias to be heard over the rushing waters of their habitat, ...
Add articles to your saved list and come back to them any time. PARIS: One of the world's smallest primates, the Philippine tarsier, communicates in a range of ultrasound inaudible to predator and ...
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