Randi Richardson is a health intern with NBC News Digital based in New York.
Drone footage of gray whales captured over seven years off the Oregon coast has revealed new details about how the giant marine mammals find and eat food. The findings, described in two studies published over the summer, include that gray whales rely on different swimming techniques to collect food based on their size and age, and that larger whales are more likely to exhale “bubble blasts” to help them stay underwater.
The first study resulting from that work, published in the journal Animal Behaviour in July, focused on variations in the whales’ foraging behavior depending on their size and habitat. The team tracked 78 gray whales during a total of 160 sightings from 2016 to 2022. In the drone footage, they observed that younger, smaller whales often swam sideways or facing forward, opening and closing their mouths in an attempt to find and take in food.
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