Recalling my bird watching skills, that bird resembles a Flicker, That crest and the speckled feather pattern (which you captured very well) are few of the characteristics I recognise. However I'm not sure if I'm right since theres no feather patterns on its chest
You did an impressive job with this, The lighting is balanced, the birds posture seems to appear correct to an extent. The only visible flaw I can make out is that theirs no indication of where the legs exit the feathers.
This link leads to a photo of the same bird (or at least very similar if my guess was incorrect) in a similar posture, you can kind of see how the legs extend from the body.
Finally, the fact you managed to get that detail in charcol, is suprising. I've tried making a drawing with charcol myself, it wasn't easy, either that or I a tad too impatient. Overall, aside from a flaw or two, this is a excellent picture.