Black Ducks 
Bald Eagle 
Robin roost 
We heard several Carolina Rails, a "Big Grunter" 
and a Yellow-throated Yireo besides many common birds. 
I returned to Concord by an early afternoon train. 
Between Lexington and Bedford I saw seven or eight King¬ 
birds flying over the fields. 
Walking at evening around the east end of Ball’s 
Hill, I saw a pair of Black Ducks and the immature Eagle 
that has been frequenting this locality of late. A Virginia 
Rail was calling cutta on Great Meadow and another gave 
the pig notes in the blueberry swamp behind the Hill where 
I think there is likely to be a nest a little later. 
The Robins came into this swamp to roost as usual —- 
about a dozen of them, all males, I think. They are 
roosting this spring in the blueberry bushes — not in the 
pines, as formerly.! 
