Tan Eggs

"When I'm a small prey mammal and I've evolved to survive the barren rocky landscape by optimizing into a tan egg"

For posts about animals that loosely fit the description above. While the animal does not have to hit all the requirements, it should hit some of them:

• Type: Prey
• Class: Mammalia (mammal)
• Habitat: Barren rocky landscape
• Appearance: Similar to a tan egg

Origin:

• Screenshot over on !science_memes@mander.xyz
• Tumblr post