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“They have a V-shaped blow,” he noted. “Sometimes we’d be right in the middle. It takes a while to get used to. It’s flying through a cloud with droplets in it. The drone ends up all slimy and rusty.”

The drone is then swabbed off and samples sent to the provincial animal pathology lab in Abbotsford and to Woods Hole Oceanographic Institution in Massachusetts.

The information should provide information on fungal, bacterial, and viral organisms in the respiratory tract of a living whale, something that cannot be duplicated during a necropsy on a dead one. Ultimately, the research is meant to offer more detail into what a healthy whale looks like.

Barrett-Lennard said that drones are a cost-efficient alternative to helicopters and are quieter and less invasive. Humpbacks give no indication of being bothered by them flying low overhead.

“We haven’t been able to detect any reaction on their part … or reason to think they even recognize the drone as something interesting,” Barrett-Lennard said. When feeding, humpbacks often attract seabirds and are “presumably used to small objects” close by, he added.

Drones have been used on the B.C. coast since 2014 on resident orcas to assess body size and health, including pregnancies. Drones are currently being used only on humpback blow sprays due to the large size.

Reduced body size can reflect age as well as lack of food, which for resident orcas tends to be chinook salmon. The killer whales are known to share their salmon catches.