You can attack more than once with a natural weapon.
Prerequisites: Dex 9, one or more pairs of natural weapons, aberration, dragon, elemental, magical beast, or plant type, base attack bonus +10.
Benefit: If you have a pair of natural weapons, such as two claws, two wings, or two slams, you can make one extra attack with one of those weapons at a –5 penalty. A creature with multiple limbs qualifies for this feat as well, such as a creature with three arms and three claw attacks.
Normal: Without this feat, you attack once with each natural weapon.
Special: You can take this feat once for each pair of natural weapons you have. For example, a Large dragon has one bite, two claws, two wings, and one tail attacks. The dragon can take this feat twice, once for its claws and once for its wings.
Source: Draconomicon, page 73.