Super Sticky Frog Spit


Ten times softer than a human tongue, elastic frog tongues store energy like a spring. Hapless prey succumb to tongue lashings five times greater than the force of gravity. Ever the perfectionist, nature wasn’t satisfied with soft frog tongues wired to change shape on contact and retraction with lunch. A dose of good measure insisted on super sticky frog spit.

Sticky frog spit alone is a fathomable concept, why wouldn’t evolution coat a frog’s soft spring loaded whip tongue with adhesive spit? Ah, but this is “super” sticky frog spit and nature likes to show off. Ponder this by Alexis Noel of Georgia Tech, lead researcher of a frog spit study published Feb. 1, 2017 in the Journal of the Royal Society Interface –

“There are actually three phases. When the tongue first hits the insect, the saliva is almost like water and fills all the bug’s crevices. Then, when the tongue snaps back, the saliva changes and becomes more viscous — thicker than honey, actually — gripping the insect for the ride back. The saliva turns watery again when the insect is sheared off inside the mouth.”

Faster than a blink of the human eye, frog saliva changes viscosity three times. I’d call that super freaking awesome sticky frog spit.

http://earthsky.org/earth/frog-tongue-in-super-slow-motion

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