It appears that April 12 was the day that Ospreys arrived at Kootenay Lake this year. Here are shots of a pair that turned up at Harrop. Osprey were apparently also seen around Nelson.
One male Osprey sits on a sign at the Harrop waterfront.
A female Osprey sits on a tree at Harrop, midday on April 12. Photo by Cynthia. 
Thank you for sharing the true spring photo!