The small tortoiseshell (Aglais urticae L.) is a colourful Eurasian butterfly in the family Nymphalidae.
It is a medium-sized butterfly that is mainly reddish-orange in colour, with black and yellow markings on the forewings as well as a ring of blue spots around the edge of the wings. It has a wingspan ranging from 4.5-6.2 cm.
The small tortoiseshell is the National Butterfly of Denmark.
It is found throughout temperate Europe, Asia Minor, Central Asia, Siberia, China, Mongolia, Korea and Japan, wherever Common Nettle which their larvae feed on is found. There are a few records from New York City which, however, are believed to be of introduced insects.