Other Common Names
Hummingbird Moths
Bee Hawk-Moths (UK)
Clearwing Moths (not recommended because the
family Sesiidae has that common name)
Synonyms and other taxonomic changes
Explanation of Names
Perhaps from the Greek
hemera (ημερα), meaning
day (1), possibly referring to the day-flying habits (
PDF factsheet on
Hemaris tityus, a European species).
Another possibility is hema- "blood" + -aris "of, pertaining to". hema is an alternate spelling of haema, which is from Greek haima (αιμα)- "blood", which usually adds a "t" when combined (Greek neuters follow different rules from other words ending with "a"), while -aris is strictly a Latin suffix. The two parts shouldn't go together at all, but someone coining a name doesn't have to follow the rules.
Numbers
4 species in North America listed at
All-Leps:
diffinis, gracilis, thetis, thysbe
About 23 species total--
Holarctic (Wikipedia)
Identification
Adults are easy to identify to genus level due to their habit of hovering around flowers like bumblebees; see individual species pages for identification to species level.
Range
Represented throughout North America, including the Arctic.
Food
Larvae feed on a variety of plants from several families, Apocynaceae, Caprifoliaceae, Ericaceae, Rosaceae.
Adults take nectar, preferably from long throated flowers, such as horse mint and are pollinators.
Internet References
pinned adult images of all 4 North American species (CBIF)
US distribution maps and other info on
diffinis, gracilis, thetis (senta), thysbe
distribution in Canada of all 4 species, listing provinces and territories (CBIF)