EIDER DUCK, BACKS, YOUNG MALES. 
End of his first and part of his second year. 
13. June gth. Age, 11 months 14. 
and 9 days. 
17. July gth. Age, 12 months 18. 
and 9 days. Very backward 
bird. 
21. Sept. 7th. Age, 14 months 22. 
' and 7 days. 
June 1 2th. Age, 11 months 
and 12 days. 
July 23rd. Age, 12 months 
and 23 days. First eclipse 
complete. 
Sept. gth. Age, 14 months 
and g days. 2nd winter 
plumage commencing. 
15. June 27th. Age, 11 months 
and 27 days, end of his first 
year. First eclipse nearly 
complete. 
ig. Aug. 3rd. Age, 13 months 
and 3 days. 
23. Oct. i6th. Age, 15 months 
and 16 days. and winter 
plumage well advanced. 
16. July 7th. Age, 12 months 
and 7 days, beginning of 
second year. 
20. Sept. 4th. Age, 14 months 
and 4 days. 
24. Nov. 6th. Age, 16 months 
and 6 days ; a late moulting 
bird. 
