Lelepago Pterix

The Lelepago Pterix is an enemy in Xenoblade Chronicles that are members of the Pterix family. They can be found at level 55 circling around the east side of the Digit 2 Plain on the Fallen Arm. Defeating two of them is required to complete the "A Tough Battle" quest. They can also drop Pterix Energy Eggs, which may be used as one method of completing the "Lifespan of a Machina" quest.

Chests rates

 * Wood = 77.6%
 * Silver = 19.4%
 * Gold = 3%

Wood

 * Materials
 * Twisted Leg - 67.7%
 * Pterix Energy Egg - 32.3%

Silver

 * Crystals
 * Aggro Up III / Ether Def Up III - 31.3%
 * Aggro Up III / Recovery Up - 31.3%
 * Weapons
 * Draft Rifle - 3.7%
 * Wolf Guarder - 3.6%
 * Cerasus Cutlass - 3.1%
 * Prosperity Biter - 2.1%
 * Armors
 * Brave Bottoms - 8.5%
 * Orion Bottoms - 6.3%
 * Brave Shoes - 5.7%
 * Orion Cap - 4.5%

Gold

 * Weapons
 * Jumbo Guarder - 14%
 * Snaer Striker - 7%
 * Unique Weapons
 * Silence - 16.8%
 * Dividing Line - 2.5%
 * Century Staff - 1.7%
 * Unique Armors
 * Blade Gear - 22%
 * Blade Armour - 18.3%
 * Blade Gauntlets - 12.3%
 * Advanced Art Books
 * Shadow Stitch - 2.4%
 * Metal Blast - 1.6%
 * Gale Slash - 0.9%
 * Power Drain - 0.4%