iSSs-] Agersborg on Birds of Southeastern Dakota. 2^7 



to find, after the most diligent search, in the counties named by 

 him, but I hope sooner or later to add them to my list. 



I would further state that all the species of the subjoined list 

 are given on the basis of actual capture. 



i. Merula migratoria. American Robin. — A not very abundant sum- 

 mer resident. I have known it to winter here four times. A temperature 

 of 39° below zero did not seem to drive them off. In winter they feed on 

 the berries of Rhus glabra and Symphoricarpus vulgaris, occasionally 

 visiting decayed trees for larvae, cocoons, etc. Eggs ready to hatch found 

 as early as May i. 



2. Hylocichla ustulata swainsoni, Olive-backed Thrush, and its variety 

 a//c/«arecommon spring and fall migrants, alicia? being the more abundant 

 of the two. Arrive the last week in April, and remain for three weeks, 

 during which time they grow very fat. Their return passage in the begin- 

 ning of October is rather hurried. 



3. Hylocichla fuscescens. Wilson's Thrush. — A rare summer resi- 

 dent; have never found its nest. 



4. Hylocichla mustelina. Wood Thrush. — Very rare. Breeds along 

 the Missouri and Big Sioux Rivers. 



5. Galeoscoptes carolinensis. Catbird. — A very abundant summer 

 bird. Arrives about May 10 and leaves last week in September. Breeds 

 everywhere. 



6. Harporhynchus rufus. Brown Thrasher. — Abundant all summer. 

 Breeds. Nests found mostly in gooseberry bushes, sometimes on the 

 ground. 



7. Sialia sialis. Bluebird. — Can barely call this a common bird here ; 

 have noted its arrival as early as February 1. 



8. Regulus calendula. Ruby-crowned Kinglet. — Passes through here 

 in small numbers about the middle of May ; have never seen it in the fall. 



9. Regulus satrapa. Golden-crowned Kinglet. — More rare than 

 the foregoing, and not met with every spring. 



10. Lophophanes bicolor. Tufted Titmouse. — Although given by 

 Professor Aughey as abundant in Dakota County, Nebraska, only thirty- 

 five miles distant, I have been unable to find it, the only Chickadee 

 found here being 



1 1 . Parus atricapillus septentrionalis, Long-tailed Chickadee, which 

 is an abundant species, especially in winter. Breeds. 



12. Sitta carolinensis aculeata. Slender-billed Nuthatch. — Resi- 

 dent; not common. 



13. Sitta canadensis. Red-bellied Nuthatch. — Also found in Da- 

 kota County, Nebraska, by Professor Aughey, but I have never seen it 

 here. 



14. Certhia familiaris rufa. Brown Creeper. — Not common; resi- 

 dent. 



15. Salpinctes obsoletus. Rock Wren. — Reported from Dakota 

 County, Nebraska; not found here. It probably can not find congenial 

 resorts with us. 



