There are many sets for snares and traps to catch birds. Gores have been used with great success on birds, and other animals and fish. Probably the easiest way is to snatch them off the roost or nest at night. My favorite is to use a minnow seine or other fishing net stretched between trees to catch them as they fly through the opening.
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"Most men take the straight and narrow. A few take the road less traveled. I chose to cut through the woods." ~Unknown~