56 The Ornithology of Chester County 
87. Pandion haliaetus carolinensis Osprey, “fish 
hawk,” “‘fish eagle,” ‘“‘eagle.”” Not uncommon trans- 
ient, and of course local. ‘There are rather indefin- 
ate intimation of it having nested along the Brandy- 
wine at one time; A. P. Lee listed it as breeding 
within a few miles of Oxford (Warren, Bds. Pa., 
1890, 143); and Dr. Montgomery noticed a pair 
on several occasions during the summer of 1888, 
along the former stream in East Bradford Twp. 
However, this species has been known to travel quite 
a distance in search of food and its mere presence 
may often be misinterpreted. I have endeavored to 
give both the spring and fall arrivals and departures 
at Berwyn vicinity: 
Arrives—Apr. 5 (1908)—Apr. 21 (1893-1903) ; 
ave. 5 yrs. Apr. 14. 
Departs—Apr. 29 (1913)—May 15 (1901); 
ave. 5 yrs. May 7. 
Arrives—Aug. 13 (1912)—Sept. 8 (1905) ; ave. 
5 yrs. Aug. 21. 
Departs—Sept. 27 (1895)—Nov. 13 (1915); 
ave. 4 yrs., Oct. 16. 
88. Aluco pratincola Barn Owl, “monkey-faced 
owl,” “southern barn owl,” “white owl.” Fairly 
common resident, formerly considered quite rare. 
The eastern part of the county the past twenty-five 
years, seems to have received an increasingly large 
number via the small creek valleys of the Delaware; 
becoming first numerous in Easttown, Willistown 
and East Goshen townships, until now it is pretty 
well distributed over the county. It nests usually 
in large isolated trees. Breeding date: East Goshem 
