Even though the rookery is not very far it is still difficult to get an unobstructed photograph of the herons on the nest, because of all of the tree branches. So the best time to get a pic is when they are flying to or from the rookery.
As part of their mating rituals the males will go out and search for branches to bring back to the females for nest improvement. So on sunny days it is possible to sit on the shore of the Mississippi and watch these large birds fly over head carrying sticks of all sizes.
When they arrive at the nest with a stick their is a intricate ritual where the male passes the stick to the female from beak to beak. She will then take the stick and work it into the nest. This helps to replace nesting material that is lost over the long winter. I hope this year to get a chance to photograph some of the chicks but unfortunately the rookery becomes much more difficult to see once the trees begin to leaf out.