We do know, however, that the most effective instruction teaches word meanings as concepts, using a variety of techniques to help students establish connections among context, their prior knowledge, and the concepts or words being taught. 1.
Turkeys don't fly a lot. They can fly short distances, and they fly down and up from their roosting trees, but they do fly. 1 person found this useful.
The flightless steamer duck of  the Falkland Islands is another bird which is an anomaly with its  family. The Giant Coot of South America is unusual, as the adult  cannot fly, but the young birds can.    There are many more species of flightless birds. See the related  Wikipedia link for a more complete list.