White opaque dot on crop.

[Nmellett]

I noticed this evening that he has an opaque white dot/bump on his crop. What could this be?

 

[Dinosrawr]

If you could get a picture, it would be a lot easier for us to help you determine what it might be. That being said, our opinion would be much better replaced with that of an avian veterinarian's. If you're concerned, I highly recommended taking in your parrot to have him checked over.