Scientists from NOAA Fisheries teamed up with colleagues at the Vancouver Aquarium to observe a pod of killer whales with a hexacopter drone. The drone flew much closer than manned aircraft usually can. With people onboard a helicopter, scientists fly no closer than 1,000 feet above the whales, but the drone could go as low as 100 feet, taking pictures all the way. This allowed the scientists to evaluate orca health, judging by the size of the whale, and it let the scientists monitor orca pregnancies. The size of the whales, and the distortion of bodies that pregnancy causes, allowed researchers to seeing just how many of these killer whale pregnancies were carried to term.