Thermal Drones Offer a Gentler Way to Check Dolphin Health

Dolphins can tell us a lot about what is happening in the ocean. When they show stress or illness, it can hint at deeper problems in the environment we all share. The challenge is that many traditional checks involve boats, tagging, or capture, and that can disturb animals.

Researchers are testing drone mounted thermal cameras to monitor dolphin health from above. Thermal cameras read heat patterns, so they can estimate skin temperature. They can also detect breathing by spotting brief bursts of warmth at the blowhole.

In a new study in the Journal of Thermal Biology, the team tested the method with 14 adult bottlenose dolphins living in captivity on Australia’s Gold Coast. The setup let them carefully compare drone readings with close range reference measurements taken at the same time. That matters because it shows whether the drone method is accurate enough to use in the wild.

The results were pretty clear. Flights around ten metres straight overhead produced the most reliable temperature estimates. As the drone flew higher, accuracy dropped, though readings still stayed within about 1°C of the reference data. Breathing rates were also visible in the thermal footage, because each breath created a small, short lived hot spot at the blowhole.

Even though the trial happened in a captive setting (which we do not approve of), the takeaway is not about the facility. It is about the tool. A method that avoids handling, restraint, and tagging could help researchers track wildlife in open water with less stress. It could also Support stronger protection efforts as oceans warm, food webs shift, and Pollution spreads.

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