Golden Lake is one of many lakes in Ontario that have seen an increase in the number of nesting cormorants over the past few years. These birds are not really an invasive species in the normal sense because they are indigenous to our region. However, toxic contamination in the lakes caused egg shell thinning and just about eliminated the birds from the province. In some ways the return of the cormorant is a sign of improved water quality.
However, the populations have increased so fast that their status as an endangered species is being challenged. The Ontario government is proposing to list the double-crested cormorant as a game bird, create a hunting season in Ontario for population management and make related changes. This proposal would be implemented through a series of regulatory and legislative amendments. They are accepting comments from the general public on the proposal, up until 3 January 2019. To see the proposal and make a comment, click here.
Here is some background information on cormorants: Cormorant Fact Sheet