When Critters Bleed ... On Purpose!

Some insects and reptiles have a strange self-preservation characteristic — they suddenly start bleeding from places like their eyes or knees. NPR science correspondent Nell Greenfieldboyce looks at "reflex bleeding" and explores some of the creatures that bleed on purpose.

For more science reporting and stories, follow Nell on twitter @nell_sci_NPR. And, as always, email us at [email protected].

Learn more about sponsor message choices: podcastchoices.com/adchoices

NPR Privacy Policy