We have crows here in town,so much for the West Nile Virus, you remember, all horses, crows, bluejays would be gone! in the end of world pheno. Funny thing is, there seems to be a number of horses, in equatorial Africa. The crows and jays are back in superior numbers than ever. The gamebirds are not. Monoculture of 20 year old "rank" grass even prairie grass, is not barren habitat, anymore than the intense tilled ground, which has some edge feathering or low lying areas to provide some bird cover. The theory here is "optima management". Rotation burning,will produce insect production, ability of optimal forage lane for chicks, the harder cover of old grow prairie will provide shade, emergency retreat ,winter cover. All if a habit has nesting cover, like wheat, or alfalfa, then what we lacking, could be hard cover of matured grass. If in most cases in public or private ground, we have to provide nesting cover, brood cover, and the requirement to provide safety, in a smaller area. Because of that fact, we need to use our ground to produce the optimum number of birds. If you are hunting a hard hunted parcel, I would be determined the bulk of roosters are going to be in a wickly wild piece of dense " hell hole of Cover", and make a majority of hunters shudder, and or avoid, the hens, on other hand, are more likely to be found in traditional areas, the one they use to raise their broods, and survive the year. I have heard that in the orginal NAGBT, It was the Mexicans that determined the crow season, Canadians, and United States wanted it unrestricted, but had to get hawks, eagles,(raptors), included, the Mexicans were inclined to include the crows. Do they eat Crows down there? I got snarly Taco's sometimes , I thought they were, iguana or "dog down the street". Crows are in a flock, are in the dictionary as " murders" of Crows! I guess that sums it up.