Everyone knows that San Franciscans have an almost pathological obsession with their animals, which might explain why the latest crop of designy digs on some of the choicest real estate around is earmarked for -- surprise! -- the city's wildlife. Caw, caw, cawwww! (Translation: Eat your heart out, humans!)

The homes make up Presidio Habitats, a new outdoor exhibit at the picturesque Presidio national park. Nearly a dozen artists, architects, and designers were commissioned to design one-off animal habitats.

Here, Chinese provacateur Ai Weiwei suspended porcelain vessels in tree branches for the Western Screech-Owl.

Don Chadwick, the man who helped give the world the Aeron chair, turned his hand to hummingbird feeders.

L.A. artist Fritz Haeg is showcasing a model home "designed to accommodate six animal clients." We have no idea how it works, but it sounds like a plot for Predator vs. Prey.

Taalman Koch Architecture, the firm that produced the gorgeous Dia Beacon art center in upstate New York with Robert Irwin, cobbled together this humble owl abode.

Here's a closeup. Looks like someone accidentally kicked a soccer ball in a tepee.

Philippe Becker Design planted three aphorisms in the ground for the American Robin, which is said to be some sort of symbol of wisdom.

The letters are made out of straw and mesh so robins can nest in them, though maybe Becker should've picked a more hospitable typeface. Look at the curve on that "f." Could anything actually roost there?

This sculptural habitat by Denmark's CEBRA, is made up of more than 350 blocks of cypress removed from the park as part of the Presidio Trust's reforestation program. Designed for the gray fox, it's actually better suited to lichen, fungi, and assorted insects; the gray fox is so rare in San Francisco nowadays, it might've disappeared from the Presidio altogether.

Artist and biologist Amy Lambert molded massive "pollen balls" for digger bees, a tribe of insects that as the name suggests like to dig tunnels for their eggs and pollen (often shaped like balls). Lambert's aim here was to bring the under-appreciated bee "into our consciousness." Stingingly effective, we'd say.

A wispy steel bar stretched along the forest floor like a Slinky, Surface Design's habitat for the Red-tailed hawk is meant both as a perch and a celebration of "the complex structure of the Red-tailed Hawk’s mating, hunting, nesting, and flying behaviors."

Not all the projects are wildlife habitats. San Francisco's Ogrydziak/Prillinger Architects designed a shipping-crate pavilion.

And Jensen Architects littered 10 sunburst-yellow chairs around the Fort Scott Parade Ground for people to sit in to experience "an acute awareness of the topography and world under the grasses; the relationship of the sky to the light reflecting off the parade ground; and an unexpected view of the landscape," which is apparently how Great Blue Herons see the world. Great Blue Herons: The acid freaks of the animal kingdom.

All told, the exhibit's a grand experiment. It's a smart use of land at the Presidio, an old military outpost that San Francisco has been fiddling around with since the '90s. (Other decommed bases, take note!) And now that the animals have new homes, maybe San Francisco -- a city believed to have one of the highest rate of homelessness per capita in the United States -- will finally turn its attention to the human population.