Northern blackbird populations are migratory, wintering in the southern United States and Mexico and breeding in the northern United States and Canada. These specific populations cause extensive crop damage to sunflowers and corn in the northern states. Blackbirds are plentiful, and relatively easy to capture and recapture and thus are good species for developing base line models that can be used to track affects of climate change on birds. Global climate change is expected to affect these populations’ migratory patterns and breeding strategies. If they can be tracked to their wintering grounds, and stop over sites on their migratory routes then Global Climate change effects can be assessed as to how these migratory populations are impacted. Using light sensitive Geolocators to track the birds to their wintering grounds will be important data for the management and control of these populations.