I figured we should start sharing our case studies, so we don't run into the problem of having TOO much of the same thing.
I will be studying the penguin's feathers in relation to double/triple curtain wall system. (More particularly Telus-William Farrell Building by Peter Busby in Vancouver.)
The properties of the feather, in a nutshell, prevent water from getting in while allowing condensation to escape. ALSO, they simply trap air to provide warmth. That's why those little creatures can dive into freezing water.
Now I will be looking into warm climates... will get back shortly!