American rubyspot

The American rubyspot (Hetaerina americana) is a damselfly of the family Calopterygidae. Males have a lustrous red head and thorax. The abdomen of both genders is brilliant green. The female may have either green or copper colored marks on the thorax.

Etymology
The name highlights this damselfly's status as the most widespread of the North American rubyspots. It is reported from all of the lower 48 US states except Washington and Idaho, and is also found in Mexico and southern and eastern Canada.