Biology professor Mitch Aide uses his ears to learn about the frogs, birds and insects that are all around him. This scientist at the University of Puerto Rico is trying to track how animal populations are affected by a world that’s under increasing pressure from human activities.

Aide says, “We would like to have five, 10, 20 years of data of how populations are changing.”

In recent years, Aide and his colleagues have been putting recorders in the field so they can listen around the clock to the species they are studying. For example, they staked out a marsh where someone …read more

Source: NPR Science – ingested into KQED

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