Every field note is written for somebody with the problem in front of them right now, and every claim in one that is not our own observation is linked to the source it came from. Those sources are the wildlife agencies and the universities: Connecticut DEEP, the New York State Department of Environmental Conservation, MassWildlife, the US Fish and Wildlife Service, USDA APHIS, the FAA, and research from Cornell, Penn State and others. The four notes published so far carry between nineteen and twenty-three such links between them.
Two things follow from that, and both are deliberate. Where the rules differ by state, the notes say so rather than averaging them into one tidy answer. And where a number is not established, it is left out. Timelines and visit counts are set per site after somebody has walked it, so you will not find a figure here that was produced before anyone had seen your ground.