570 THE BLACK TERN. 
voir. On these occasions they feed with a peculiar motion, by which they 
cull some tidbit from the surface of the weed-strewn water, and regain a 
higher level after each stroke without wetting the wings; but whether they 
find insect prey or only vegetable matter, I have not been able to determine. 
In searching for the nests of the Black Tern one must penetrate the 
Taken near Sandusky. Photo by the Author. 
JUST OUT. 
EGG AND YOUNG OF BLACK TERN. 
JOZY recesses 
of some un- 
disturbed 
swamp, pref- 
erably in a 
flat - boat. 
Here in a 
secluded bay- 
ou the birds 
will hover 
about the in- 
truder, fret- 
ting and 
screaming in- 
cessantly. if 
the water be- 
comes too 
thick with 
mud and tan- 
gled vegeta- 
tion to admit 
of easy pass- 
age, one must 
be content to 
strip off and 
wade through 
black water, 
say Six inches 
deep, over 
black mud 
one and a half 
feet deep, and 
be prepared 
as well for 
occasional 
plunges into 
uncharted 
