Because game management is based on regions and zones... for migratory birds, it is based on flyways "and" winter and summer ranges... needs change up and down each flyway... it would make no sense to attempt to manage numbers in several flyways using data from a single flyway, ie. Using Brandt population data from the Atlantic flyway and applying it to the Pacific flyway... or Central snow goose data and applying it to the Atlantic. It is no different than managing deer herds in different provinces. Would you want the recently established Ontario elk herd to try to hold up under a No-Draw over-the-counter tag purchase system? We have already seen how that game management goes in the closure of grizzly hunting in the GBR... an area that has an extremely healthy, huntable population of gizzlies. In this day and age, emotion and rhetoric is ruling over science in game management and that does not bode well for the future.