THE OTTAWA NATURALIST. 



Vol. XX. 



OTTAWA, FEBRUARY, 1907. 



No. 1 1 



A SWARM OF BUTTERFLIES. 



By George H. Bradshaw, Morden, Man. 



About the twentieth of August of this year the writer, in com- 

 mon with many others in this district, had the opportunity of see- 

 ing" a rather unusual and certainly an interesting- sight. Whether 

 interested in such matters or not, one could not help noticing one 

 dav countless numbers ot a lar^e fiery-rust-colored butterfly 



which I have since learned from Dr. Fletcher was the Milkweed 

 Butterfly, Anosia plexippus that came over-night, or at least 

 seemed to come over-night, for there they were one bright morn- 

 ing hanging on the trees and shrubs, in such numbers and so 

 closely together, that the trees on which they had settled were 

 simply a blaze of red. 



Apparently they liked the early morning sun, for they were 



