Calamia tridens, the Burren Green, is a moth of the family Noctuidae.

Whitish green, of the o more or less suffused with grey except along costa, showing a pale curved outer band; fringe white; — in ab.

nov. [Warren] has the forewing glossy dark sea-green, with the outer half of fringe greenish; the hindwing green flushed with darker green and the veins green: head and thorax sea green like the forewings; the abdomen white as in typical virens: the description is made from 1 male and 2 females in the Tring Museum, unfortunately without locality label, but probably of German origin; 1 female has a diffuse whitish smear on the discocellular, the others are immaculate: the ab.

[1] The moth flies in one generation from late June to September.

[2] It is found in the Palearctic realm, Central Europe, (not Britain but found in Ireland, found in southern Sweden, not in southeast France, not in Spain, not in southern Italy), West and Central Russia, Hungary, South Russia, Armenia, Asia Minor, Iran, West Siberia to the Altai Mountains and Kazakhstan.