DELAWARE VALLEY ORNITHOLOGICAL CLUB. 57 



this year — two-thirds of all the first arrivals reported by thirty- 

 six observers in the Philadelphia district being on these days 

 and the day immediately following each. 



New arrivals, Wave I 



March 2. Bluebird, Field Sparrow. 



March 3. Purple Grackle, Kingfisher, Flicker, Killdeer, 

 Robin, Savanna Sparrow. 



There was a general flight of Grackles, arrivals being reported 

 from seven stations. Nearly all the species comprising this 

 wave were resident at one station or another ; but only actual 

 migrant individuals have been considered in the above state- 

 ment. 

 Nciv arrivah, Wave II 



March 13. Brown Thrasher, Myrtle Warbler. 



March 14. Hermit Thrush, Phoebe, Cowbird, Fox Sparrow. 



March 15. Vesper Sparrow. 



From March 14th to 16th the chief migrants were: the Grackle 

 arrived at 10 stations, Killdeer at 3, Robin at 15, Red-winged 

 Blackbird at 16, Phoebe at 9, Fox Sparrow at 15. 



New arrivals, Wave III 



March 23. Chipping Sparrow, Towhee. 



Main migrants: Field Sparrow arrived at 12 stations March 

 23rd-24th, Flicker at 11, Phoebe at 8. 



New arrivals, Wave IV 



March 27. Barn Swallow. 



Jlarch 28. Tree Swallow, Ruby-crowned Kinglet. 



March 30. Rough-winged Swallow. 



Chief migrants: Chipping Sparrow arrived at 15 stations 

 March 2Sth-30th, Vesper Sparrow, 6 stations, March 29th-30th. 



Beginning with the extremely low mean temperature of 34° 

 on April 1st, this month showed no sudden rise until April 28th 

 lo 30th, when there was an increase of sixteen degrees. There 

 was, however, a steady rise of 28° continuing from April 19th 

 to April 2Gth. The mean temperature of the month was 47°, 

 four degrees below the mean of thirty-seven years, while the 

 precipitation was nearly normal. There were severe frosts on 



