Bird Migration in the Mississippi Valley. 27 



Red-eyed Vireo (F. olivacea). St. Louis Summer so journer. On April 

 25 first saw a single individual in song, and again on the 27th. May 2 and 

 3. The bulk of the birds were here. Jefferson Summer sojourner. On 

 May 19 first saw several, but probably came several days previous. About 

 the height of the migration after May 25. 



Philadelphia Vireo ( F. Philadelphia). St. Louis Transient. First seen on 

 May 21, and the last on May 22. Jefferson Not seen. 



Warbling Vireo (F. gilva). St. Louis Summer sojourner. On April 18 first 

 saw two singing at old stands. April 22. Have increased and are regularly 

 heard, and by the 29th they were mating, and were industrious songsters. 

 May 1 Height of the migration. Jefferson. Summer sojourner. Was the 

 first vireo of the season, and came on May 5, when four single ones were seen 

 at as many widely separated places ; all in full song. May 6. Quite an in- 

 crease ; heard in about a dozen places, and on the 7th they were much the 

 same with a few additions. May 12. The height of the season ; forty to fifty 

 seen during the day. May 19. The height still continued with much 

 song. 



Yellow-throated Vireo (L.flavifrons). St. Louis Summer sojourner. First 

 seen on April 17; in song. May 1. Height of the season. Jefferson Sum- 

 mer sojourner. First saw one on May 10. May 12. Height of the season, but 

 the bulk departed during the next week Saw one on May 19, and another on 

 the 23d, which was the last one noted, though it probably breeds in favor- 

 able localities. 



Blue-headed Vireo (L. solitarius}. St. Louis Transient. First saw one on 

 May 5, which was silent, and again on the llth, one bird. Jefferson Sum- 

 mer sojourner. First saw five on May 10, also on the 12th, a few, and on 

 the 19th, three or four. 



White-eyed Vireo (F. noveboracensis). St. Louis Summer sojourner. On 

 April 14 first saw one bird at old stands, and on the 17th, several. May 1. 

 Only about one-half regular number here ; but on the 3d they were in full 

 numbers, and on the 15th a nest containing four fresh eggs was found. Jef- 

 ferson. Certainly occurs, but not identified. 



Bell's Vireo ( F. belli ). St. Louis Summer sojourner. First seen on 

 April 25, and not again until after May 1. On May 5 they had increased, and 

 on the llth the males were singing about seventeen times a minute. May 

 15. Full numbers. Jefferson Probably does not occur. 



Loggerhead Shrike (L. ludomdamis). St. Louis Summer resident. None 

 seen between December 30 and February 23. March 14. A migrating shrike 

 was seen to fly north at 11 a. m., going in a straight line as far as my glass 

 could reach him. It is seldom that we see small birds on their way mi- 

 grating. On April 15 I found a nest, and on May 26 fledged young. Jefferson 

 Summer resident. Twice seen during the Winter, and at one time I saw it 

 catch and kill an English sparrow. 



Cedar Wax-wing (A. cedrorum}. St. Louis Summer resident. First seen 

 on April 9 and 12, in flocks. Jefferson Summer sojourner. On May 10 first 

 saw a flock of about twenty. Strange they should not have come earlier. May 

 17. A second flock was seen, and by the 19th they had become more com- 

 mon, one or more flocks being seen every day. May 21. First arrivals have 

 passed on, and no more have come to take their place. 



