It's Our Nature to Know

The Alberta Biodiversity Monitoring Institute Blog

Double-crested Cormorant with Burbot at Carseland Weir

The Carseland Weir is a structure within Wyndham-Carseland Provincial Park in Alberta. It’s a barrier across the Bow River used to measure and alter its flow. Fish are unable to swim upstream from the bottom of the weir. So, American White Pelicans and Double-crested Cormorants benefit from the fish pooling below the weir. The habitat surrounding the weir is used by both species as gathering areas, as well as for fishing. The park, downstream from the weir, is an attractive area for camping, boating, and fishing. So, the Carseland Weir benefits both birds and people. My photo shows a Double-crested Cormorant that has just speared a large Burbot (or Ling Cod), which the bird swallowed in 5 seconds from the time it surfaced with its prize.