Monarchs, Viceroys and Queens
- Christopher Majca muses on the Batesian and Mullerian mimicry used by butterflies, particularly the unpalatable Monarch and the edible Viceroy.
- http://www.chebucto.ns.ca/Environment/NHR/monarch.html

Butterflies of Ecuador
- Past and current research on Ecuadorian butterflies.
- http://www.butterfliesofecuador.com/

Butterfly Conservation Initiative
- Dedicated to the conservation of threatened, endangered, and vulnerable North American butterflies and the habitats that sustain them, with a focus on recovery, research, and education.
- http://www.butterflyrecovery.org/

Linneaus' Butterfly Type Specimens
- Images of the type specimens of dozens of species. From the Natural History Museum, London.
- http://www.nhm.ac.uk/research-curation/projects/linntypes/

The Butterfly Conservatory
- Past exhibit at the American Museum of Natural History: photographs, webcams, virtual tour.
- http://www.amnh.org/exhibitions/butterflies/