Ducks and geese spend *a lot* of time preening their all-weather feathers. This obsessive grooming – and a little styling wax from a hidden spot on their back side – maintains the microscopic feather structure that keeps them warm and dry in frigid waters. Choose an animal that lives in a "harsh" environment. Describe one of the features that protects them from this environment. How does the structure of this feature affect the function?

Find (or take!) a photo that demonstrates your animal's unique feature.