Habits of Aid- Thrush. 



143 



the ctenomys are larger and otherwise different from those now 

 referred to. At the time of our visit the birds were not at all 

 shy, allowing one to approach within a few yards of them. These 

 are gregarious — at least at this time of the year — moving in 

 flocks from place to place over the sandy plain ; and it was 

 sometimes rather astonishing to see a flock suddenly emerge from 

 a number of burrow openings, and rise on the wing from a bare 

 sandy patch of ground, where a moment previously there had 

 been no sign of life. 



FISH-HOOKS OF ONION 

 ISLANDERS (»«/. 157). 



