Call Of The Beast

Warlock Invocation
Level: Least, 2nd lv.
Components: V, S
Casting Time: 1 standard action
Range: Self
Duration: 24 hours.
Saving Throw: None
Spell Resistance: No

You gain a rapport with the beasts of the world. You gain the wild empathy ability as a druid of your warlock level and can communicate with animals as if under the effect of speak with animals. This invocation lasts for 24 hours.

(Complete Arcane, Page 134)