Here's a link to the zilker park map.
http://www.apachecon.com/2006/US/ima...kerParkMap.pdf
Near the bottom right of the map where it's labeled Barton Springs Dr. I saw this critter right between Springs and Dr. As we walked under Barton Springs Dr. on the trail, it was at the base of a tree about 6ft off the trail on the river side. When you go under the bridge, there's a rail. We were standing at the rail and it was at the base of the big ?Oak?/?Elm? tree right in front of us. This was sometime right around noon.