Hey, do the world a favor and target as many Eurasian Collared Doves as you can! They are substantially larger than the native Mourning Doves, so more meat. The Eurasian Collared Doves have the distinctive black stripe around the back of the head, and a broad band of white feathers at the end of the tail. There's no limit on these non-native birds because they are impacting populations of our native Band-tailed Pigeons which nest in the mountain Ponderosa Pine and Douglas Fir forests. There's also evidence Collared Doves rob nests of native Mourning Doves.
There is a good article on hunting the Eurasian Collared Dove in the recent Colorado Outdoors. Rack 'em and stack 'em!