Iris
Guides
Eulonchus tristis
small-headed fly
Eulonchus tristis is a small-headed fly (family Acroceridae) native to western North America. Adults are known flower visitors, particularly of Brodiaea elegans and Iris douglasiana in California, where they carry substantial pollen loads. The species has been documented as a potential pollinator, especially for B. elegans. Like other acrocerids, larvae are parasitoids of spiders.
Macronoctua onusta
iris borer, Iris Borer Moth
Macronoctua onusta, commonly called the iris borer, is a noctuid moth native to North America. Adults are large, dull brown moths with distinctive smoky dark gray patterning and a uniquely shaped reniform spot. The species is a foodplant specialist whose larvae bore into the rhizomes of iris plants, making it a notable pest in gardens and horticulture. Adults fly in autumn, primarily September and October.