Blindsense [Wild]

You can sense creatures that you cannot see.

Prerequisites: Wild shape, Listen 4 ranks.

Benefit: You can expend one daily use of wild shape to gain blindsense for 1 minute per Hit Die, enabling you to pinpoint the location of a creature within 30 feet if you have line of effect to that creature. You retain this benefit regardless of what form you are in.

Source: Complete Adventurer, page 114.