interest to his rambles. He will find that. though to-day none of them are visible, to- 
morrow the trees and bushes may swarm with the active little creatures, while on the next 
day, perhaps, all will have departed. It is this element of uncertainty as to what a walk 
will disclose that fascinates the observer, and tempts him into the woods and fields even 
upon unpromising days and in the most inclement weather. 
The Parula Warbler is a trim, graceful little bird, but a poor singer. 
YELLOW WARBLER. SUMMER YELLOWBIRD. 
Dendroica cstiva. 
Above greenish-yellow ; crown and under-parts golden, streaked with 
reddish-brown ; wings and tail dusky, most of the feathers edged with 
yellow (tail nearly square); bill brown; feet paler. Length, 5.10 inches. 
Migratory. Arrives early in May, leaves early in September. Orchards and gardens 
furnish the conditions it prefers for a nesting site. 
Flight undulatory ; song pleasing but unimportant. 
‘This species is remarkable,” writes DeKay, ‘for its instinctive sagacity in getting 
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