§THE MAIN NEOTROPICAL FLYWAY IN THE WEST - TEN TIMES
THAT OF ANY OTHER WESTERN CORRIDOR.
§CRUCIAL POLLINATOR CORRIDOR FOR THE WESTERN
HEMISPHERE.
§THE LONGEST CONTINUOUS ARCHEAOLOGICAL RECORD IN THE
CONTINENTAL U.S.
§CONCLUSION: THE SAN PEDRO RIVER BASIN IS A “KEYSTONE” TRANSITION
ZONE THAT SUSTAINS BIODIVERSITY IN OTHER ECO-REGIONS.