Requirements include

  • flowers as a nectar source
  • larval host plants of a particular species. The monarch's dependence upon milkweed is the best known example, but all species in the category have a similar relationship.

 (c) Mike Pearson

Threats include:

  • loss of open habitats for nectar producing flowers and larval host plants due to land development, natural succession or tree planting projects.
  • insecticide use.


Protect nectar and larval host plant populations

  • Manage habitats on local government lands for the appropriate successional stage, in consultation with species experts.
  • Ban herbicide use for cosmetic purposes on lands under local government jurisdiction (municipalities only).
  • Acquire habitats by purchase or parkland dedication during the land subdivision, rezoning or development permit processes.
  • Restrict access to habitats on local government lands.
  • Adopt sensitive maintenance protocols on local government lands.
  • Prevent disturbance during development activities through the subdivision, building, or development permitting processes.
  • Require the control or eradication of 'invasive alien' plants, as listed in the Community Charter's Environment and Wildlife Regulation (municipalities only).

Increase availability of nectar and larval host plants

 (c) Detmar Schwichtenberg

  • Seed appropriate plants in public parks, flower beds and other public lands.
  • Encourage landowners to establish butterfly gardens containing appropriate plants through public education materials and programming.
  • Require the seeding of appropriate plants on suitable lands through the subdivision and development permit processes.

Reduce insecticide use

 SXC images

  • Ban insecticide and herbicide use for cosmetic purposes on lands within jurisdiction (municipalities only).

  • Eliminate insecticide and herbicide use on local government lands.