Why aren't endangered species protections treated more like eminent domain? In cases where cooperation is more efficient than completely taking the land, the re

Why aren't endangered species protections treated more like eminent domain? In cases where cooperation is more efficient than completely taking the land, the restrictions can be added to the property deed and the owner compensated. Putting arbitrary and unpredictable costs on landowners seems like a bad system. EDIT: by "bad system", I mean "less effective and less fair".