562 



FROM NORTH POLE TO EQUATOR. 



though only a very small fraction of the feathered population 

 could be seen, and indeed the tide of migration was still in full 



Fig. 82. Nest of the Penduline Titmouse (Parus pendulinus). 



flood. Great flocks of black terns flew in almost unbroken 

 succession up the river, sometimes assembling in compact swarms, 

 sometimes distributing themselves over the whole breadth of the 

 flooded Danube; hundreds of glossy or dark ibises wandered up 

 and down the stream, flying in the usual wedge-shaped order 



