Pear Slug Sawfly vs Hawaiian Assimulans Yellow-faced Bee

Side-by-side species comparison

Attribute Pear Slug Sawfly Hawaiian Assimulans Yellow-faced Bee
Scientific Name Caliroa cerasi Hylaeus assimulans
Order Hymenoptera Hymenoptera
Family Tenthredinidae Colletidae
Size 4-6 mm (adult) 6-8 mm
Habitat Orchards Beaches & Coastal
Diet Herbivores Nectar Feeders
Regions Worldwide Oceania (Hawaii)
Conservation Not Evaluated Endangered

Pear Slug Sawfly

A cosmopolitan sawfly whose slimy, slug-like larvae skeletonize leaves of cherry, pear, and plum. Heavy infestations cause premature leaf drop.

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Did You Know?

Larvae cover themselves in a dark, slimy secretion that makes them look like tiny slugs.

Hawaiian Assimulans Yellow-faced Bee

A rare endemic bee from the Hawaiian Islands, once found on several islands but now severely reduced in range. It nests in the stems of native plants and abandoned beetle holes. Habitat loss and invasive species have drastically reduced its populations.

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Did You Know?

This bee is one of seven Hawaiian yellow-faced bee species federally listed as endangered, highlighting the perilous state of Hawaiian native pollinators.