Eclipse Butterfly

HUD description before collecting: Moon Butterfly (Rare Butterfly): It's the rare Moon Butterfly. Only known for it's rude gestures to other butterflies. +1 Trophy

description in menu after collecting: Eclipse Butterfly: Super rare butterfly here.

Worth 100 Bear Points

The Eclipse Butterfly (confusingly mislabeled in the HUD as the Moon Butterfly before it has been collected) is a Den Trophy, and one of the four butterflies needed to win the achievement Rare Butterfly Hunt.

Once collected, the butterfly will appear in your Den, pinned on the wall behind your trophy shelf.

Location
The Eclipse Butterfly is in Mystic Meadow in Arni Forest.

Stand in Mystic Meadow with the waterfall behind you. In front of you will be a pine tree on a small hill. Behind and to the left of that tree is a small berm against the foot of the cliff. Jump up on that berm, and you'll find the butterfly frolicking on a tulip.