How surely the birds kw their enemies! See how the wrens and robins and bluebirds pursue and scold the cat, while they take little or tice of the dog! Even the swallow will fight the cat, and, relying too confidently upon its powers of flight, sometimes swoops down so near to its enemy that it is caught by a sudden stroke of the cat's paw. The only case I kw of in which our small birds fail to recognize their enemy is furnished by the shrike; apparently the little birds do t kw that this modest-colored bird is an assassin. At least, I have never seen them scold or molest him, or utter any outcries at his presence, as they usually do at birds of prey. Probably it is because the shrike is a rare visitant, and is t found in this part of the country during the nesting season of our songsters.