II 
the original scheme, and it was decided to increase the size of the original 
area to include the whole Mississippi Valley. 
In 1888 the U. S. Dept, of Agr., Division of Economic Ornithology, pub¬ 
lished Bulletin No. 2, W. W. Cooke’s “Report on Bird Migration in the 
Mississippi Valley for the years 1884-5.” 
Since then no attempt has been made to my knowledge to gather mater¬ 
ial for a report on bird migration in Iowa. 
Our Association has taken up the work and as Chief of this interesting 
branch of the study, I earnestly ask the hearty co-operation of every mem¬ 
ber of the I. O. A. Without your aid, there can be no success. 
Let us go to work in earnest—let us put down our daily records full and 
complete, and then when our notes are published in connection with the 
“Birds of Iowa,” each individual member of the Association will have 
reason to feel proud of the work so cheerfully done. Get ready for the 
spring migration—due credit will be given in the forthcoming report to 
every one contributing to its success. Yours in the work, 
Carl Fritz Henning, 
Chief Migration Department. Boone, Iowa. 
Bira migration in Iowa, instructions to ^Collaborators. 
The department particularly desires from each observer a brief but 
careful description of the principle physical features, including latitude, 
longitude and altitude of the locality which is the seat of observations. 
The data collected may be arranged conveniently in three general class¬ 
es ; a. Ornithological Phenomena; h. Meteorological Phenomena; c. 
Contemporary and Correlative Phenomena. 
a. ORNITHOLOGICAL PHENOMENA. 
Each observer is requested to prepare, at his earliest convenience, a 
complete list of the birds known to occur in the vicinity of his station, 
and to indicate (by the abbreviations inclosed in parentheses) to which of 
the following five categories each species pertains : 
1. Permanent Residents, or those that are found regularly throughout 
the year. (R.) 
2. Winter Visitants, or those that occur only during the winter season, 
passing north in the spring (WV). 
3. Transient Visitants, or those that occur only during the migrations, 
in spring and fall (TV). 
4. Slimmer Residents, or those that are known to breed, but which de¬ 
part southward before winter (SR). 
