The city is an unnatural place. I’m reminded of this weekly as I stroll to work in Adams Morgan on Fridays amid the post-drunk carnage of 18th Street. Partially eaten jumbo slices and unidentifiable chicken parts adorn my path; swarmed around it all are the birds. Delicate, glassy-eyed sparrows peck away at their fried and breaded brethren. Starlings dip their slender beaks into the congealed mozzarella that even inebriated college students could not digest. Bird feeders are urgently needed, and the Kathleen Ewing Gallery has some very tasteful selections. “Birdhouses” collects photographs, drawings, and three-dimensional assemblages that put my rented three-bedroom Victorian to shame. Culling materials from playing cards to pencils, Claudia Smigrod’s Cribs-worthy constructions marry form, function, and food. And if Hitchcock long ago turned you off from our winged compatriots, take comfort: Proceeds benefit their mortal enemy, feral cats. The show is on view by appointment (see City List for other dates) at the Kathleen Ewing Gallery, 1609 Connecticut Ave. NW. Free. (202) 328-0955. (Kara McPhillips)