262 AMERICAN MIDLAND NATURALIST 
FEBRUARY. 
Birds not seen on any day: 
Snowbird Snowflake 
Sereech Owl Chickadee 
Goldfinch 
Birds seen on the dates after their names: 
CIGW. ot. jane. LO eo, 22. tO. BrowniCreener, ane 
Bish 7 oh ees =" Downy Woodpecker, 6, 16, 20 
White-breasted Nuthatch, 2, 11, Tree Sparrow, 15 to 18, 20, 23, 
14, 24 24,127,720 
Blue: Jay, 2;: 5,.6,.9,. 11,84 to... sparrow Hawk, 
17, 24, 25, 27; 28, 29 
Total number of species seen in February, 8. 
MARCH. 
Birds not seen on any day: 
White-breasted Nuthatch, Brown Creeper 
Birds seen on the dates after their names: 
Crow, {1 40°47 ko" £0; a2 Hairy Woodpecker, 2 
Bliwe jay 723 Ayo Ons wees Snowflake, 2, 3 
Robin, 3 Redpoll, 5 
Downy Woodpecker, 7 Tree Sparrow, I 
Total number of species seen up to March 14, 8. 
Total number of species seen during the winter, 15. 
MIGRATION OF OUR BIRDS IN THE AUTUMN OF tort. 
It will be seen by making a comparison between the autumn 
migration in 1909 and that of 1911 that the dates are very close 
in the case of some species, while in others there is seen to be a 
difference of three weeks or a month. Is the great disparity in. 
some dates due to an actual difference or is it because the writer 
has failed to observe the correct dates in such instances? With 
a few species the writer is willing to admit that he may have 
missed the right dates by many days, but when the number of 
species showing such disparity in their time of migrating is not 
few, he believes there was a considerable difference in the time of 
leaving in the two seasons. 
As to what was the cause of such a wide gap in the dates, the 
