Bright red iʻiwi birds are among the offenders. Jessie Knowlton/UCR Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Birds in Hawaii are stealing from each other, and this bird-on-bird crime even extends to members of the same species. It’s an example of kleptoparasitism , or when an animal steals things from another. Specifically, these colorful, winged kleptoparasites are pilferring nest-material, sometimes causing the demise of the depleted nest.  Researchers documented this behavior while observing over 200 native canopy-nesting birds nests on the island of Hawaii—aka the Big Island. The birds included the apapane ( Himatione sanguinea ), the i‘iwi ( Drepanis coccinea ), and the Hawai‘i amakihi ( Chlorodrepanis virens ). Though there has been anecdotal evidence of such theft, a study recently published in The American Naturalist represents the first instance of it being tracked and quantified in nature.…