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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Butterflies and Moths (Lepidoptera) » Hooktip and False Owlet Moths (Drepanoidea) » Hooktip and False Owlet Moths (Drepanidae) » Hooktip Moths (Drepaninae) » Falcaria » Two-lined Hooktip - Hodges#6252 (Falcaria bilineata)

Species Falcaria bilineata - Two-lined Hooktip - Hodges#6252

Classification · Hodges Number · Other Common Names · Synonyms and other taxonomic changes · Explanation of Names · Size · Identification · Range · Habitat · Season · Food · Life Cycle · See Also · Print References · Internet References · Works Cited
6252 Two-lined Hooktip - Falcaria bilineata two-lined hooktip - Falcaria bilineata Two-lined Hooktip - Falcaria bilineata - male Drepana bilineata - Falcaria bilineata Drepana bilineata - Falcaria bilineata Two-lined Hooktip (Drepana bilineata) - Falcaria bilineata Drepana bilineata ? - Falcaria bilineata Drepana bilineata - Falcaria bilineata
Show images of: caterpillars · adults · both
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Drepanoidea (Hooktip and False Owlet Moths)
Family Drepanidae (Hooktip and False Owlet Moths)
Subfamily Drepaninae (Hooktip Moths)
Genus Falcaria
Species bilineata (Two-lined Hooktip - Hodges#6252)
Hodges Number
6252
Other Common Names
Warty Birch Caterpillar (larva)
Synonyms and other taxonomic changes
Falcaria bilineata (Packard, 1864)
Drepana hudsoni Barnes & Benjamin, 1922
Prionia levis Hudson, 1893
Falcaria rampartensis (Barnes & Benjamin, 1922)
Explanation of Names
Falcaria bilineata (Packard, 1864), rev. comb., was formerly included in the genus Drepana and includes rampartensis (Barnes & Benjamin, 1922), formerly a subspecies of bilineata, as a new synonym of same (Schmidt in Pohl & Nanz (eds.) 2023). (1)
Size
wingspan 28-34 mm
Identification
Adult: forewing light brown to orangish-yellow with scalloped outer margin and hooked tip; AM and PM lines brown, straight, parallel; reniform spot a black dot; first brood moths have many dark wiggly lines crossing wing; in second brood individuals, these lines are few or lacking.
hindwing white or pale yellow with small indistinct discal spot and thin brown terminal line

Larva: body purplish or reddish-brown mottled with yellow and covered with warts or tubercles; tail end tapers to a point

Pupa: purple with diffuse black spots, pointed rear end, and covered with fine white powder as though dipped in flour
Range
coast to coast in northern United States and southern Canada (Newfoundland to New Jersey, west to Oregon, north to British Columbia)
Habitat
deciduous woodlands
Season
The flight period is April to September (two broods). (2)
Food
larvae feed on leaves of alder, birch, poplar
Life Cycle
two generations per year; pupation occurs within a cocoon hidden by a folded leaf
Larva; larva; adult
See Also
Arched Hooktip lacks two straight parallel lines on forewing
Rose Hooktip is colored differently and also lacks two straight parallel lines on forewing
Print References
Packard, 1864. Proceedings of the Entomological Society of Philadelphia, 3: 376.
Powell, J.A. & P.A. Opler, 2009. Moths of Western North America. University of California Press, pl. 27, fig. 2; p. 202. (3)
Internet References
Pacific Northwest Moths (4)
Moth Photographers Group (2)
iNaturalist
Butterflies and Moths of North America
University of Alberta E.H. Strickland Entomological Museum
Barcode of Life Data Systems (BOLD) (5)
synonyms plus references and links to images (Markku Savela, FUNET)
Mass Moths
Vibration-mediated territoriality in the warty birch caterpillar Drepana bilineata
Works Cited
1.Annotated Taxonomic Checklist of the Lepidoptera of North America, North of Mexico
Pohl, G. R. and S. R. Nanz (eds.). 2023. Wedge Entomological Research Foundation.
2.North American Moth Photographers Group
3.Moths of Western North America
Powell and Opler. 2009. UC Press.
4.Pacific Northwest Moths
5.BOLD: The Barcode of Life Data Systems
Contributed by Robin McLeod on 14 February, 2006 - 11:10pm
Additional contributions by Steve Nanz, Tony-2, Maury Heiman, marcie oconnor
Last updated 24 January, 2025 - 4:45pm

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