BIRDS THAT PREY AND SOME THAT DO NOT 509 



nest. The blackbirds must have commenced the 

 upper nest as soon as the wrens finished the lower 

 one. 



In both the upper and lower stories of this sea- 

 side apartment house the eggs were warm when 

 discovered, which proves that the mother birds had 

 been off the nests but a few moments. The writer 

 knows of no other recorded instance of a com- 

 pound nest occupied by the red-winged blackbird 

 and the little marsh wren. 



