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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Clostera apicalis - Apical Prominent - Hodges#7901

moth - Clostera apicalis 7896 Angle-lined Prominent Moth - Clostera inclusa - Clostera apicalis - male Apical Prominent - Hodges#7901 - Clostera apicalis Notodontidae: Clostera apicalis - Clostera apicalis Clostera apicalis Angle-lined Prominent - Hodges#7896 (Clostera inclusa) (May 31, 2016) - Clostera apicalis Apical Prominent - Hodges#7901 - Clostera apicalis  Clostera apicalis - Clostera apicalis
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Notodontidae (Prominent Moths)
Subfamily Pygaerinae
Genus Clostera
Species apicalis (Apical Prominent - Hodges#7901)
Hodges Number
Other Common Names
Red-marked Tentmaker (larva)
wingspan 26-31 mm
Adult: forewing gray with dark reddish/burgandy subapical patch; wings held tight to abdomen when at rest; PM line has white squiggle just below costa; median area crossed by diagonal whitish line from costa to inner margin; hindwing variably off-white to pale yellowish-brown

Larva: body dusky-gray or brown with pale dorsal and subdorsal stripes, and abundant short white hairs; sides of abdomen with two or three pale wavy stripes; head reddish-brown with strong black mottling, often absent over vertex and posterior to eyes
[adapted from description by David Wagner and Valerie Giles]
northeastern and western United States, and across Canada, north to Northwest Territories
adults fly from May to August
larvae in August and September
larvae feed on leaves of birch, poplar, willow
Life Cycle
two generations per year in the south; one in the far north
Eggs (not fertile); larva; adult
Larvae often form communal nests of silk.
See Also
Striped Chocolate-tip (Clostera strigosa) forewing subapical patch is yellowish/gold, not dark reddish/burgandy as in C. apicalis
Angle-lined Prominent (Clostera inclusa) is very similar but forewing PM line is straighter where it meets costa (compare images of this and other Clostera species by Jim Vargo at MPG)
Internet References