{"english":"Alder Flycatcher","french":"Moucherolle des aulnes","aou":4661,"minimum_year":1978,"warning":"Alder and Willow Flycatcher were considered a single species until 1973. It is likely that they are not accurately separated by BBS observers until at least some years after that split."}
{"english":"Willow Flycatcher","french":"Moucherolle des saules","aou":4660,"minimum_year":1978,"warning":"Alder and Willow Flycatcher were considered a single species until 1973. It is likely that they are not accurately separated by BBS observers until at least some years after that split."}
{"english":"Clark's Grebe","french":"Grèbe à face blanche","aou":11,"minimum_year":1990,"warning":"Clark's and Western Grebe were considered a single species until 1985. It is likely that they are not accurately separated by BBS observers until at least some years after that split."}
{"english":"Western Grebe","french":"Grèbe élégant","aou":10,"minimum_year":1990,"warning":"Clark's and Western Grebe were considered a single species until 1985. It is likely that they are not accurately separated by BBS observers until at least some years after that split."}
{"english":"Eurasian Collared-Dove","french":"Tourterelle turque","aou":22860,"minimum_year":1990,"warning":"Eurasian Collared Dove was introduced into North America in the 1980s. 1990 is the first year that the species was observed on at least 3 BBS routes."}
{"english":"Cave Swallow","french":"Hirondelle à front brun","aou":6121,"minimum_year":1985,"warning":"Cave Swallows were relatively rare in the areas surveyed by BBS before 1980. There are only two observations during BBS before 1980."}