An unusual surge in the invasive Canada thistle (Cirsium arvense) has been observed in Alberta, attributed to climate change, land disturbances, and poor pasture management.
The city keeps a record of the number of reported sightings of the animals, along with other wildlife. There were three sightings in 2007, about 10 in 2015 and 27 this year.
This most Northerly Bobcat (Lynx rufus) observation in the iNaturalist database marks the leading edge of the northward expansion of this species.
