A new way of looking at hummingbird tongues sees them mainly as long, skinny pumps.
This view challenges an old notion of how hummingbirds sip — that nectar flows up open grooves in the tongue the way water rises inside thin capillary tubes, says functional morphologist Alejandro Rico-Guevara of the University of Connecticut in Storrs. It’s the latest in a lively debate over just how hummingbird tongues work.
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