Tunnel Fit principle
Lessons from Black-footed Ferret
Enter the tunnel.
Prairie-Dog Burrow Hunting

Core lesson
The right shape turns another creature’s tunnel into your path.
Biological basis
Black-footed Ferrets have long slender bodies adapted for entering prairie dog burrows, where they hunt prairie dogs and use burrow systems for shelter.
Best use cases
Where this lesson tends to be most useful in practice.
Specialized huntingBurrow systemsFitHidden pathsPrairie survival