Not Quite White

I am continuing to work on my seagull drawing. 

I am not too happy with how the reflection looks at the moment. I began wishing that I had done this drawing on toned paper (perhaps a grey) which would mean I could use a white pencil to put the white in. Because I am using the paper as the white it is harder to see how the white will look until all the blue and grey is coloured in. The white in my source photograph is very bright and the paper may not be bright enough to express that.

It is important not to make a negative judgement too early so I intend to continue on and see what happens when more of the blue is added. Although it is harder to erase coloured pencil than graphite, I can erase or lighten some of the reflection colours and make adjustments later on.
It is in the struggle that you learn to become a better artist even though that struggle is often discouraging and/or frustrating.