参考答案

正确答案：BD
解析：Birds that eat insects have a slender, tweezer-like bill: Birds that eat insects collect their food in a number of ways. The warblers have short, slender, tweezer-like bills, that they sort of use like tweezers to pick small insects off leaves and twigs. Insect eaters also have a long, sticky tongue: The insect eater's tongue—like the bill—is specialized to the bird's diet. The tongue of some woodpeckers is long, sticky.... (2.2)