This tutorial (all 3 parts) in book form: [link]
Full tutorial list: [link]
Well then, enjoy! If I don't see another beak in my life it'll be too soon...
a couple small nitpicks:
pretty much all birds have a nicitating membrane/third eyelid - in fact, even some mammals still have them! i understand that that part of the guide had to go Somewhere, of course, so i'm not judging you for putting it in the falconid section - it just might've been nice to specify that it's not exclusive to that group c:
and, as others have pointed out, falcons probably aren't that closely related to other birds of prey. i'm not sure if that was known when this was made, though, so it's probably not a big deal tbqh
that said, this series is still very helpful and informative, and i'm sure many bird-loving artists (myself included) are very glad you made it. guides like yours are life-savers.
That's fair enough, this is so old I can't even remember why certain choices were made. I had started a revised and much more in-depth version of it, but was never able to find the time to complete it.
You are welcome.
If you don't mind, I'd like to ask: How has Lulu.com has worked out for you? I read how to upload something there. I wasn't sure if it was worth it to try one small book on SketchUp. I see that you have a number of really good items up there; so, even if you make only a little bit of money on one item, you probably sell a lot of them.