Yellow warbler with its wormy catch
These birds can be found all over North America, their bright yellow plumage bringing a joyful spot of color to any tree or shrub. They also bring an appetite, which is good news for plants wanting to be rid of parasites. Yellow warblers feast on insects and invertebrates, gleaning them from bushes and tree branches. Caterpillars are a favorite food for chicks still in the nest, and perhaps that's where this unfortunate bit of prey is headed.