The Monarch Monitoring Project is a long-term study on monarch migration through Cape May, NJ. It is a part of the New Jersey Audubon Research Department, and closely affiliated with the Cape May Bird Observatory. This project is the longest-running monarch migration monitoring project in North America, and is one of the best sources of information on the status of monarch populations that migrate along the Atlantic coast. This program was initiated in 1990 by Dick Walton and Lincoln Brower, and involves driving a fixed route through the town three times daily during the fall months, and all monarchs seen are counted. The Cape May monarch program also involves capturing and tagging monarchs with uniquely numbered stickers (not the same as MonarchWatch stickers), and there is a large outreach component to the project; since this site is frequented by thousands of tourists and birders, the monarch team regularly gives monarch demonstrations at the hawkwatch pavilion.
Brower, L., Taylor, O., Wiliams, E., Slayback, D., Zubietas, R., and M.I. Ramirez. 2011. Decline of monarch butterflies overwintering in Mexico: is the migratory phenomenon at risk? The Royal Entomological Society, Insect Conservation and Diversity 5(2):95-100
Gibbs D, Walton R, Brower L, Davis AK. 2006. Monarch butterfly (Lepidoptera : Nymphalidae) migration monitoring at Chincoteague, Virginia and Cape May, New Jersey: A comparison of long-term trends. Journal of the Kansas Entomological Society 79: 156-164.
Walton RK, Brower LP. 1996. Monitoring the fall migration of the monarch butterfly Danaus plexippus L. (Nymphalidae: Danainae) in eastern North America: 1991- 1994. Journal of the Lepidopterists' Society 50: 1.