For several years I watched a pair of osprey (Pandion haliaetus) raise their young in a nearby nest. Last year I was surprised to discover a pair of Canada geese (Branta canadensis) had co-opted the osprey nest. The geese fledged four chicks, of which three survived the high leap from the nest. The osprey returned while their nest was “sublet”, but they were unable to claim their summer home until the geese departed. Two osprey chicks eventually fledged. (See Surprise Tenant on 03-27-15, Surprise Tenant 2 on 04-12-15, Surprise Tenant 3 on 04-13-15 and Surprise Tenant 4 on 04-13-15.)
Again this year the Canada geese are using the osprey nest. The geese appear to have reinforced the nest with mud and organic material. It will be interesting to see if the geese again raise a family and if osprey subsequently do the same.
This osprey nest is near Crystal Lake in Shasta County CA.