An example of a 13km radius from South Africa's OR Tambo International Airport (frontiersin.org, 2021). Ask most people where an airport's responsibility for wildlife begins and ends, and they'll point to the perimeter fence. That fence stops people. It does nothing to stop birds and other wildlife. Birds don't recognise property lines or the difference between "airside" and "somebody's golf course." What they recognise is food, water, shelter, and the absence of threats. An airport, seen...