See that's where it gets confusing to me. In an earlier law (seems to be from 2009 or 2010) it states you need to follow the migratory bird laws (shotgun and archery, possible trapping, I can't remember as I am tunneling on airguns). If you look under the "Legal Manner of Taking," it states "small game mammals" can be taken with airguns, but then in the "small game birds (except migratory)" it states only 2 species there. I'm new to Colorado, and I'm new to bird hunting, but here's my take:
They specifically state Eurasian Collared Doves in the "Small Game Birds - Migratory Game Birds" section on page 10, even though it's an invasive species. Why not add in there a one-liner saying "doesn't follow traditional rules"?
In the Small Game Hunting Laws on page 5, since they have a section about ECDs on page 10, why not add "ECDs" to the list of those 2 birds legally huntable with airguns?