

PLATE I 

 DWIGHT PLUMAGE AND MOULT 



Photograph showing the natural size, pattern and wear of the prin- 

 cipal feathers of Dolichonyx oryzivorus, a Passerine bird. They are 

 all from males and some of the buff winter feathers have printed so 

 much darker than they actually are that they, unfortunately, appear 

 to be black. 



Figs. 1-6. Throat, September 2d (J. D. Jr., No. 5125). 



7. Middle rectrix, " " " " 



8. Secondary, " " " " 



9. Tertiary, " " " " 



10. Primary, " " " " 



11. Dorsal feathers, " " "' " 



12. Scapulary, " " " 



13. Greater covert, " " " " 



14. Median covert, " " " " 

 15-16. Lesser coverts, " " " " 



17. Crown, " " " " 



18. Forehead, " " " " 

 19-20. Side, " " " " 



21. Flank, " " " " 



22. Breast, " " " " 



23. New black breast feather, March ist (Amer. Mus. 



Nat. Hist., No. 32873). 



24. Worn black breast feather, May i7th (J. D., Jr., No. 



2164). 



25. Much worn black breast feather, July 2d (J. D., Jr., 



No. 1227). 



26. New buff abdominal feather, Sept. 2d (J. D., Jr., 



No. 5125). 



27. Worn buff abdominal feather, March ist (Amer. Mus. 



Nat. Hist., No. 32873). 



28. Partly worn black abdominal feather, May i7th (J. 



D., Jr., No. 2164). 



29. Much worn black abdominal feather, July 2d (J. D 



Jr., No. 1227). 



(348) 



