Pale Triangle vs Large Alderfly

Side-by-side species comparison

Attribute	Pale Triangle	Large Alderfly
Scientific Name	Graphium eurypylus	Sialis nigripes
Order	Lepidoptera	Megaloptera
Family	Papilionidae	Sialidae
Size	6-7 cm wingspan	15-20 mm
Habitat	Rivers & Streams	Rivers & Streams
Diet	Nectar Feeders	Herbivores
Regions	Australia, Indonesia, Papua New Guinea	North America
Conservation	Least Concern	Least Concern

Pale Triangle

A fast-flying swallowtail with pale blue-green triangle markings on black wings. It frequently puddles on wet sand and mud along creek beds.

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Did You Know?

Males form dense congregations of up to hundreds on wet riverbanks to extract minerals from mud.

Large Alderfly

A relatively large alderfly with dark wings and black legs found near rivers in eastern North America. Adults rest on streamside vegetation during the day.

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Did You Know?

Alderfly larvae breathe through feathery gills along their abdomen and a single long tail filament that acts as an additional gill.