From CSUMB's science illustration program.
This guy was a spot illustration assignment in colored pencil on any surface we wanted - I chose duralene (a kind of semi-transparent film that you can draw on both sides). Duralene makes prismacolors really intense and creamy, and you can paint on the back in white gouache, shade on the back with graphite pencil, or add more colors on the back for an underpainted effect. Here I just have some graphite on the back to darken some places. And I used an x-acto knife to scrape the little feather details.
Used one of my own photos taken at Tucson's Desert Museum's walk-in hummingbird aviary as a reference.
Art copyright me. For display only. Do not use without my permission.