gleaning

noun4

1. •
   The act of collecting leftover crops from farmers' fields after they have been commercially harvested or on fields where it is not economically profitable to harvest.
2. •
   Something learned by gleaning.
3. •
   (informal) Dumpster diving.
4. •
   The catching of insects and other invertebrates by plucking them from within foliage, or sometimes from the ground. It may also be applied to where prey is picked off, or from within, natural and man-made surfaces such as rock faces and under the eaves of houses.