12/01/2020
Researchers use drones to count river dolphins in Brazil
JURUÁ RIVER :: BRAZIL In November 2016, a riverboat threaded its way along 250 miles of the Juruá River in the western Amazon. A team of researchers stood at the bow, each one gazing intently at the water through binoculars. Above them, a quadcopter drone whirred along like a giant white insect, t...