Animals and plants.
Studies from real life or photos.

http://romeroleo.com/files/gimgs/th-26_tayra.jpg
http://romeroleo.com/files/gimgs/th-26_mantis.jpg
http://romeroleo.com/files/gimgs/th-26_vulture.jpg
http://romeroleo.com/files/gimgs/th-26_manati.jpg
http://romeroleo.com/files/gimgs/th-26_azulejo thraupis episcopus.jpg
http://romeroleo.com/files/gimgs/th-26_el-jardin.jpg
http://romeroleo.com/files/gimgs/th-26_deer ciervo.jpg