Hunters and Industry: An Essential Partnership for Migratory Bird Conservation Photos and Story by Mark LindbergThe 1918 Migratory Bird Treaty Act (MBTA), an international conservation partnership between the U.S., Canada, and Mexico, is widely regarded as the most successful partnerships for bird conservation in the world.   Built on the backs of waterfowl hunters and the dollars they give to conservation, the MBTA has resulted in North American (NA) waterfowl and waterbirds being the ...