sentences:  Gleaning (birds)
  
  Gleaning is a feeding strategy by birds in which they catch invertebrate prey, mainly arthropods, by plucking them from foliage or the ground, from crevices such as rock faces and under the eaves of houses, or even, as in the case of ticks and lice, from living animals.This behavior is contrasted with hawking insects from the air or chasing after moving insects such as ants.