Wood-fly
Guides
Blera humeralis
Yellow-legged Wood Fly
Blera humeralis, commonly known as the yellow-legged wood fly, is a Nearctic species of hoverfly (Syrphidae) described by Samuel Wendell Williston in 1882. Adults are flower visitors that feed on nectar and pollen. The species is notable for its distinctive yellow and black coloration and rat-tailed larvae that develop in tree rot holes and sap flows. It is considered uncommon and has a restricted coastal distribution in western North America.
Blera nigra
Golden-haired Wood Fly
Blera nigra, commonly known as the golden-haired wood fly, is a Nearctic syrphid fly species first described by Williston in 1887. Adults are flower-visiting hoverflies that feed on nectar and pollen. The species exhibits distinct sexual dimorphism in facial coloration and antennal structure. Larvae are of the rat-tailed type, developing in tree rot holes or exuding sap.