Blindsight

(Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers, page 21, DnD 3.0)

[Wild]

Your senses are as keen as the bat's.

Prerequisite

Ability to use wild shape to become a dire bat

Benefit

You gain the extraordinary ability blindsight (as described in Chapter 3 of the DUNGEON MASTER'S GUIDE), which operates regardless ot your form. Like the dire bat, you emit high-frequency sounds, inaudible to most creatures, as a lorm of "sonar" that allows you to locate objects and creatures within 120 feet. Since this ability relies on hearing, any circumstance that deprives you of that sense also negates your blindsight