THE SPRING MIGRATION 



375 



Catbird. Oct. 6-14. 



Wood Thrush. Sept. 18. 



Wilson's Thrush. Aug.-Sept. 



May 10-20. White-crowned Sparrow. May 12-22. 



Cliff Swallow. Aug.-Sept. 



Cape May Warbler. May 13-16. 



Bay-breasted Warbler. May 18-27. 



Wilson's Warbler. May 22-30. 



Canadian Warbler. May 21-30. 



Gray-cheeked Thrush. May 11-27. 



Olive-backed Thrush. May 17-29. 

 May 20-30. Yellow-bellied Flycatcher. May 20-25. 



Mourning Warbler. May 26. 



