PART IV. 



NOTES ON EACH SPECIES OF BIRD OBSERVED AT ST. LOUIS, 



MISSOURI, AND JEFFERSON, WISCONSIN, DURING THE 



SPRING MIGRATION OF 1883. 



Wood Thrush (Hylocichla musteline^. St. Louis Summer sojourner. The 

 first seen was on April 19, when two were found at old stands singing a few 

 strains, when it began to rain. April 22, two were in full song. April 29 

 they were still quiet and scarce. May 1. They are exercising every morn- 

 ing now, and by the 16th had become conspicuous and diligent songsters. 

 Jefferson Summer sojourner. First one was seen on May 10, and by the 

 12th there had been a decided increase and many were heard and six or eight 

 seen ; the bulk of the birds have not yet arrived. May 17. This day marked 

 the height of the migration, and by the 21st they had settled down to Summer 

 numbers. 



Wilson's Thrush (H.fuscescens). St. Louis Transient. First seen on May 

 14, and were numerous on the 15th, 16th and 17th. On the 21st several were 

 seen and they were the last. Jefferson Transient. First seen on May 7. 

 May 12 the bulk of the birds were with us, but they were gone a very few 

 days later, and only one was seen on the 21st, which I supposed was the last, 

 but on the 24th they were as numerous as at any time this Spring. The last 

 one seen was on May 30. 



Gray-cheeked Thrush (II. alicice). St. Louis Transient. Last seen on May 

 22. Jefferson transient. Only identified on May 24. 



Olive-backed Thrush (H. ustulata swainsoni). St. Louis Transient. First 

 one seen on April 26 and no more until May 2 when the bulk arrived. On 

 the 5th was the height of the migration. Were still present on the 10th, and 

 from the 14th to 18th quite numerous. Last one seen on May 24. Jefferson 

 Transient. Have lost my record of the first one, but a second was seen on 

 May 3. On the 12th I met with the tawny thrush quite often ; about the 

 height of the migration. During the next week the bulk departed, and on 

 the 19th only three were seen. On the 24th they were as numerous as at any 

 time this Spring. Last seen on May 31 . 



Hermit Thrush (H. unalasccB pallasi). St. Louis Transient. First seen on 

 April 9, and from the 10th to the 12th was the height of the migration. Last 

 seen on April 13. Jefferson Transient. First one seen on April 4 ; another 

 seen on the 5th, which I shot. One or more seen nearly every day until the 

 20th, when they began to be more common. On May 6 the bulk departed 

 and the last one was seen on May 10. 



Robin (Merula migratoria). St. Louis. Summer sojourner. First seen on 

 February 22 when there were about thirty in a flock in a wood. On March 

 4, several small flocks were seen at different places, but the bulk had not yet 



