Vipers evolved either nose or eye horns depending on their habitat

The horns on vipers’ eyes could help camouflage their head in rocky areas or trees, while those with nose horns may blend in better on forest floors

Vipers evolved either nose or eye horns depending on their habitat
The horns on vipers’ eyes could help camouflage their head in rocky areas or trees, while those with nose horns may blend in better on forest floors