I also noticed the increase in numbers of Night Heron at Tsing Yi Park and a very big decline in the numbers at Causeway Bay Typhoon Shelter. The typhoon shelter use to have 30+ birds but lately I have only seen several.
The main reason in the decline at the Causeway Bay Typhoon Shelter is all the construction work for main infrastructure projects. These projects will take years to complete so maybe the Night Herons will go forever. There used to be a lot of Little Egrets roosting at the typhoon shelter but their numbers are down to just a couple
