The mapping of the Natural Heritage System in the Official Plan is based on the best available information at the time the natural heritage policies in the Official Plan were updated (2010).  It is important to understand that the City has not been comprehensively surveyed for all flora, fauna or their habitats. Natural systems are also dynamic and can change over time. As such, when new or updated information becomes available additional natural heritage features and areas may be identified. Newly identified natural heritage features and areas must meet the applicable definitions and criteria contained within the Official Plan. This is typically done through studies completed as part of a development process.  This may include Subwatershed Studies, Environmental Assessments and Environmental Impact Studies.