Individual Exercises for the Spring Term 



Five studies follow, which, like those for the Fall Term 

 (pages 126 et seq.) , are intended to be made by the student 

 working alone. The first three may be entered upon early 

 in the term (in our latitude); the other two are for the 

 latter half of the term. 



Optional Study 6. A Calendar of Bird Return 



This study is available only to those who know the birds 

 at sight, or who are willing to take the necessary trouble 

 outside of this course to really make their acquaintance. 

 Doubtful identifications will render the record quite worth- 

 less. Permission to offer this record will therefore have to 

 be obtained in advance of undertaking the work. 



The object of this study is to give opportunity for extend- 

 ing personal acquaintance with our local migratory birds 

 on the part of students who already know them by sight. 

 Field observations, made at least once a week, may con- 

 veniently be entered in a cross-ruled table having the left- 

 hand column reserved for bird names, and each of the other 

 columns devoted to one day's observations, the date, time of 

 day, and relevant weather conditions being written at the 

 top. Following each bird's name, there should be written 

 in the proper date columns, the observations made upon it: 

 number and sex seen at first appearance; arrival of sexes, 

 and of young birds, separately; arrival of "waves" of 

 migrants; etc. 



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