24 Bird Migration in the Mississippi Valley. 



say, it was a female. No more were seen until April 25, when there appeared 

 three males in high plumage, and no more until May 2, when a flock of five 

 were seen in the city. Previous to May 2 yellow rumps and pine creeping 

 warblers were the only warblers seen, and only nine individuals in all, while 

 at the same date they appeared at St. Louis. The night of May 1 marked the 

 first wave of warblers, and on the 3d I found a flock of about twenty-five 

 yellow rumps, both male and female, and in loud song. May 4. — Yellow 

 rumps are at this date the most numerous of the warblers ; about twenty-five 

 to thirty in twos and threes. About four-fifths were males in full plumage. 

 May 5. — None were seen, but on the 6th about eighteen. May 7. — Males of 

 last year are here ; most old males have gone. May 12. — Bulk departed, and 

 on the 17th the last one was seen. 



Black and Yellow Warbler (D. maculosa). St. Louis — Transient. First 

 seen on May 3, when they were numerous and singing, and on the 10th they 

 were still here. May 14 to 17. Both males and females were numerous, and 

 on the 21st the last one was seen. Jefferson — Transient. First saw three 

 males on May 10, and on the 12th the bulk of the birds were here and the 

 migration was at its height; they were the most numerous warbler of this 

 date. May 20 — Two were seen, and on the 28th the last one. 



Cerulean Warbler (D. cm'ulea). St. Louis — Summer sojourner. First seen 

 on April 17. Jefferson — Not seen. 



Chestnut sided Warbler (D. pennsylvanica). St. Louis — Transient. On 

 April 27 first saw an old male in song, and again on May 2 and May 10. May 

 11, 14 and 15, both males and females were numerous. On May 21 I found a 

 female singing! May 24 — Last one seen. Jefferson — Summer sojourner. 

 On May 7 first saw three or four in a miscellaneous flock of warblers. May 12 

 — Not quite the bulk of the species, but on the 17th there was the bulk of the 

 females, and the height of the migration. May 19 — Bulk departed ; but six 

 or eight seen, all males. Only a few remain to nest, I think about four to six 

 pairs in the same number of square miles about here. One nest was found, 

 and the birds seen through the whole month of June. 



Bay-breasted Warbler {D. eastanea). St. Louis. — Transient. On May 3 first 

 saw a male, which was silent. May 21 — Last seen of both male and female. 

 Jefferson — Not seen. 



Black-poll Warbler (D. striata). St. Louis — Transient. On May 2 first saw 

 one male and heard several. On May 3 the first female was seen and many 

 males were singing after 11 a. m. May 10. — Still here, and from the 15th to 

 the 18th both male and female were numerous. May 24. — Last one seen. 

 Jefferson — Transient. On May 10 first saw one male. 17th, the bulk was 

 here. May 19. None seen. May 21. — First female, which was the last of 

 the species seen. 



Blackburnian Warbler (D. Uackbumia). St. Louis. — Not seen. Jefferson — 

 Transient. First saw two males on May 10, and on the 12th was the height of 

 the migration, though there were very few. May 16. — One was seen, and on 

 the 17th the last one. 



Yellow-throated Warbler {D. dominica). St. Louis — Summer sojourner. 

 First seen April 12. On April 18 three males were seen on high trees, and 

 on the 19th many were in song. Jefferson — Does not occur. 



Black-throated Green Warbler {D. virens). St. Louis. Not seen. Jeffer- 



