The Heron Colony at the Great Blue Heron Nature Reserve is active from early March to late July.
- the colony is situated in a grove of mature cottonwood trees.
- the best colony viewing is from the dyke trial just west of the Interpretive Centre.
- in 2016, there were over 125 active nests.
- herons choose a new mate each year.
- nest selection and courting starts in early March.
- 3 -5 eggs are laid in late March and hatch about a month later.
- incubation is 28 days
- chicks take 10 weeks to go from a newly hatched chick to a fully fledged juvenile.
- on average 1 chick per nest survives.
- eagles are a major predator, eating the eggs and chicks.
- having one territorial eagle in their midst actually protects the herons from further predation from outside raptors
- a large eagle nest is located right beside the colony.
- raccoons can climb the trees to get eggs or chicks.
- all of the trees are protected by fencing to keep the beavers from bringing them down.
- watch for otters playing in the water in front of the nesting site.
- also watch for woodpeckers, swallows,mergansers and wood ducks.