The New York Times reports
When food gets scarce, monarch butterfly caterpillars will turn on each other, duking it out for the rights to grub, according to a paper published Thursday in the journal iScience. The jousts don’t get bloody. But they involve plenty of bumping, boxing and body-checking — all the makings of a big brawl of babies, in a hurry to bulk up before they sprout their grown-up wings.
Read more at Don’t Get Between a Caterpillar and Its Milkweed – The New York Times
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