High altitudes hamper hummingbirds' ability to maneuver

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Hummingbirds' ability to accelerate and turn diminishes at high altitudes, but it isn't a lack of oxygen to the body that limits the birds' performance—it's physics.

"Hummingbirds' acceleration, rotation and turning skills are key to their ability to compete for food and defend territory," said UBC zoologist Douglas Altshuler, senior author on the paper.