Site description (2001 baseline):
Frank Lake has a history of fluctuating water levels; during the 1930s, 1940s, and mid 1980s it was dry for extended periods of time, while during the 1950s and mid 1970s flooding occurred. On occasions when the lake flooded, the local and provincial governments called for drainage of the lake. Ducks Unlimited (DU) persuaded the government away from this course of action and since then have been managing the area and controlling water flow. After the lake dried up in the 1980s, DU looked for a source of water for the lake.
Several threatened species occur here, but some such as Burrowing Owl (endangered), Loggerhead Shrike (threatened) and Piping Plover (endangered - last recorded in 1990) have not been seen in recent years. Others, such as Peregrine Falcon (vulnerable), Ferruginous Hawk (vulnerable), Long-billed Curlew (vulnerable), and Short-eared Owl (vulnerable) are all still seen at Frank Lake. The uncommon Bairds Sparrow also breeds here.
Frank Lake is considered the most important wetland in southwestern Alberta for breeding water birds. The most abundant breeding water bird is perhaps Franklins Gull, because several thousand of this species nest here (in 1971 the colony consisted of over 10,000 individuals). Other common breeders are: Eared Grebe, Black-crowned Night-Heron, California Gull, Ring-billed Gull, and Common Tern. Many other species breed in smaller numbers, including the unexpected Black-necked Stilt. In the fall, the shorebird migration is noteworthy over 20 species have been seen including species that are seen more commonly further west.
The effect of the many visitors to Frank Lake, who come to bird-watch, hunt, and conduct research, is being taken into consideration by Ducks Unlimited. Access restrictions and bird-watching blinds are two methods being considered or already underway to help modify this potential problem.
BirdLife International (2023) Important Bird Area factsheet: Frank Lake (south). Downloaded from http://datazone.birdlife.org/site/factsheet/frank-lake-(south)-iba-canada on 10/12/2023.