Frogs Birds and Towers

How in the world is it April already??  Getting back into a study mood I dug out a few specific animals from my big book.  I basically wanted to play with a more subtle exaggeration of their features, namely searching for a better understanding.  So here have some parrots and an assortment of frogs!  If only I didn't enjoy detail I could have drawing 3 pages of birds..

I've also done a handful of fairly quick tower sketches.  Many were lifted from my previous posts page, exploring the shapes a bit further.  Now its time to figure out who lives in each, and adjust the design accordingly.

Which might you say are most interesting, and who/what lives there?