Fig. 57 of the Sermonibus Animalis series.  This Snail Kite is so good at counting his prey, he decided to use an abacus for good measure. The other birds have moved on to calculators, but not this guy. Timeless technology never goes out of style..
 
Original illustration w/ ink & brush tip marker on textured, parchment toned paper.  
 
8.5" x 11"