COMMON GOLDENEYES, DUFFERIN ISLANDS PARK/NIAGARA RIVER, NIAGARA FALLS, ON

   In the first photo the male Common Goldeneye is on the right and the female on the left.  In the second photo the male is on the left and the female on the right.  The Common Goldeneye in the third photo is a male.

HOUSE SPARROW, DUFFERIN ISLANDS PARK, NIAGARA FALLS, ON

MALE NORTHERN CARDINAL, DUFFERIN ISLANDS PARK, NIAGARA FALLS, ON

MALE RING-NECKED DUCK, DUFFERIN ISLANDS PARK/NIAGARA RIVER, NIAGARA FALLS, ON

MALLARDS, WINDERMERE BASIN, HAMILTON, ONTARIO

LESSER SCAUPS, WINDERMERE BASIN, HAMILTON, ONTARIO

BUFFLEHEADS, WINDERMERE BASIN, HAMILTON, ONTARIO

   In the first photo, the duck on the right is a male Bufflehead and the other two ducks are female Buffleheads.  In the second photo the Buffleheads on the lower left and and upper right are males and the third one is a female.  The third photo shows a male Bufflehead.