Nesting of the Kentucky Warbler in 
Chester and Delaware Coun- 
ties, Penn. 
Having been quite fortunate in finding nests 
of this Warbler (Geothlypin formosa) during 
the past season I thought that my experiences 
might be of interest to the readers of the 
O. & O. 
Another year’s collecting leads me to think 
that my assertion, that the Kentucky War- 
bler probably bred more commonly in these 
two counties than anywhere else, was correct. 
To a practised person the nest of this bird is 
not very difficult to find, unless it should be 
placed on a hillside. 
They begin to breed often about the 18th of 
May. Some nests found by me this year must 
have had their full complement of eggs by the 
20th of May. Then on the other hand my last 
set was taken on the 18th of June, and my 
brother took a set of four fresh eggs on the 
25th of June, and a nest was found on the 15th 
of July with young birds, so there is often a 
difference of a month between the incubation 
of different pairs. 
On the 21st of May I found my first nest this 
year. It was just finished, and I secured a 
fine set of five eggs exactly one week later 
(the 28th) from it. 
It. was placed at the bottom and between 
the forks of a spicewood hush and was a very 
bulky nest. The $> was not on the nest, and 
I presume had just laid one of the eggs that 
morning. It was not more than ten yards 
from the edge of the woods. When I was 
packing up the eggs and nest there was no 
sign of the birds around, but when I again j 
passed the spot about fifteen minutes later 
both birds were making a great noise. 
The second nest was found on the 25th of 1 
May, and contained two eggs of the warbler j 
and one of that pest, the Cowbird. I had been 
looking for this nest for about two or three 
hours before I succeeded in finding it. The 
birds had been making a great deal of noise, 
and had been jumping up every few minutes 
from a clump of swamp cabbage. As there 
was a great deal of this plant in the woods 
and the wood was a large one, it can easily 
he seen that it was no easy matter to find 
that nest. At last I happened to glance down 
328. Kentucky Warbler ■ By Edgar A. Small. Ibid., VI, p. 64. 
Q t Qt> Short note, on itMiest and eggs. 
310. Kentucky Warbler [ Oforornis formosa']. Its Nesting Habits. 
By F. T. Jencks. Ibid., VI, p. 49. 
