8 T.H-E: cA UsDsU (BON 7B Ur GO ia 
Northern Yellow-throat — A common migrant and a summer resident. 
Partial to low shrubbery near water. 
Yellow-breasted Chat — Rare summer resident. It is possible one of 
those recorded was starting to nest. 
Wilson’s Warbler — A common migrant. Another of the late arrivals. 
Saw eight between June 3 and June 6 last year. 
Canada Warbler — A fairly common migrant. Also a late arrival. 
Recorded five on June 6, 1945. 
American Redstart — Most abundant migrant and a summer resident. 
Simplicity of identification may have some influence on the high proportion 
recorded. Oddly enough, the greatest number of any warbler I have ever 
observed at one time was not in the spring, but on September 5, 1936 in 
Calvary Cemetery when redstarts were feeding on every tree and bush. 
I made a sample count of 150 by plotting, and estimated a minimum of 
600 birds in the eastern half of the cemetery. 
In addition to the 33 species listed, “Birds of the Chicago Region” 
includes seven additional species which I have not seen in our area. This 
is not surprising as they are all rare for this territory, but it is a singular 
fact that I have never seen the blue-winged warbler when I have seen 
both of its more rare hybrid offsprings—the Lawrence’s warbler and the 
Brewster’s warbler. Mrs. Amy Baldwin tells me she sees the blue-winged 
warbler nearly every year in the Indiana Dunes; however, this does not 
indicate that its appearance is frequent for few of us have the rare combi- 
nation of Mrs. Baldwin’s keen knowledge of birds, and her boundless 
enthusiasm and energy for constant field trips, regardless of weather or 
distance. 
I have previously admitted that more observations early in the season 
would have some effect on averages, but I want to cite a significant 
experience which shows that more intensive observations during the last 
ten days in May might well have the effect of a counter-balance on earlier 
observations. On Sunday, May 27, 1945,.I spent about three hours in 
different localities when there was a real “wave” of warblers. With 
extremely bad visibility and most of the birds high in the tree tops, I 
recorded 14 species among 48 individuals. This incident also shows the 
necessity for regularity of records, if we are to know what is the exception 
and what is normal. I saw very few birds May 26 yet the many birds 
observed on the following day had a very material effect on both my 1945 
list, and the “last” dates for the 10 year period. I presume this was an 
unusually late movement but I am not at all sure about it. 
In the frequent comparisons with “Birds of the Chicago Region” I have 
had no thought of criticizing its authors. We should all be most grateful 
to Mr. Ford and his associates who compiled the list. I am sure they made 
the best possible use of the facts available at the time but I believe we do 
need much more information for an enlarged revision. Numerous situations 
like the count of May 27 indicate that this information should come from 
daily carefully written records by many observers in various habitats and 
localities. 
