>> our inspiration is a great blue heron. it was the site itself that attracted us. this is an incredibly beautiful outdoor room. we did a bit of reverse engineering once we knew we wanted to work here. which animals live here? the great blue heron jumped out at us. we walked around, and quickly, you get into another pace. you slow down, leave the city behind you. you can feel the wind and the breeze. in our increasingly frenetic, fast-paced, connected life, the chance to be of here and slow down a bit was part of the agenda. as part of the installation, it was suggested that this would be deliberately not mowed because it would allow the sustaining of insects, plants, that would graduate -- that would gravitate to the area. >> that is right. i think you quickly notice that. >> thank you for being here. presidio habitat is an exhibition at the presidio trust. it will be in san francisco through may 2011. we hope you will come out to experience this amazing exhibition and great natural treasure. >> to learn more about the other habitats installations in the presidio,