Hieracium murorum
- Several photographs of the Few-leaved Hawkweed and some identifying features.
- http://www.plant-identification.co.uk/skye/compositae/hieracium-murorum.htm

Hieracium umbellatum
- Several photographs of Leafy Hawkweed and some identifying features.
- http://www.plant-identification.co.uk/skye/compositae/hieracium-umbellatum-agg.htm

Hieracium pilosella
- Several photographs of Mouse-ear Hawkweed and a description of the plant.
- http://www.plant-identification.co.uk/skye/compositae/hieracium-pilosella.htm

Hieracium aurantiacum
- Several photographs of Fox and Cubs and a description of the plant.
- http://www.plant-identification.co.uk/skye/compositae/hieracium-aurantiacum.htm

Hieracium umbellatum (Northern Hawkweed)
- Images plus facts on physical features and habitat.
- http://www.bio.brandeis.edu/fieldbio/leeci_unet/northernhawkweed.html