peregrines_sealProject2Poisoning from DDT and related chemicals had devastating effects on Peregrine falcons (Falco peregrinus) during the 1950’s – 1970’s., young peregrine falcons were released along the cliffs of the Mississippi River near Kellogg, Minnesota in 1982 to help re-establish populations in the Upper Midwest.  These releases expanded over many years, and populations have risen. The peregrine falcon was de-listed from the Endangered Species list in 1999 and is being monitored for changes in the population that might require re-listing by the U.S. Fish and Wildlife Service (USFWS). The State of Minnesota removed the species from its Threatened list in 2013 due to the continued growth in the state’s peregrine population.

The work has changed in its focus from releasing captive bred birds to one of monitoring and studying the nesting birds and the success of their offspring.  Former Minnesota Zoo zookeeper Jackie Fallon monitors nearly 50 of the 57 known peregrine falcon territories in Minnesota and North Dakota for the Midwest Peregrine Society.  Monitoring and banding peregrine falcons involves 1) identification of all known birds, 2) confirming presence at a new site when reported, 3) monitoring the nest site to determine courtship behavior, number eggs laid, hatch date of chicks, and 4) determining a banding date of any known nestlings. Chicks are banded with two types of leg bands that allow for identification of birds via spotting scopes.  A blood sample and sometimes a feather clipping are also taken for contaminant and genetic studies. Chicks and adults are monitored continues past fledging date and into the fall migration season. Injured or abandoned chicks are also rescued during fledging.

Minnesota Zoo’s Ulysses S. Seal Conservation Grant Program provided funding in 2005, 2007, 2008, 2012, and 2013 to monitor and band peregrine falcons as part of this successful program. It has allowed Jackie Fallon, Jenny Prom (Veterinary Technician), and Karla Anderson (Minnesota Trail Zookeeper) to personally participate in this successful program.