1886
(Aug. 5)
them chirping at frequent intervals up to twelve
o'clock. From the general appearance of things
today it is evident that many of our resident 
(local) birds have left while the presence of 
the Canada Warbler and Water thrushes show
that at least a few new mother birds have 
arrived. The truth undoubtedly is that many 
species (of Warblers at least) have been migrating
extensively for the past week but being
mostly species which breed here the fact is 
not realized by one who depends on described
observations. Thus such birds as Dendroica
aestiva and Mniotilta varia have been seen
by us daily in not strikingly varying
numbers the places of those which have
left being probably filled by others from
further north.