General:
Bruce Trail Conservancy – great information on Niagara Escarpment Biodiversity, Species at Risk as well as our own Geotrails:
https://brucetrail.org/what-we-do/#escarpment-biodiversity
INaturalist – https://inaturalist.ca/projects/bruce-trail-conservancy
 
Bird ID:
Merlin – https://merlin.allaboutbirds.org/
Larkwire – https://www.larkwire.com/
 
Plant ID:
Ontario Invasive Plants
Ontario Invasive Plant Council Landowner Guides
North American Native Plant Association
Google Lens
Picture This

One Page Fact Sheets:
Ontario Invasive Species Fact Sheets