Declining-populations
Guides
Automeris io
Io moth, peacock moth
Automeris io is a colorful North American saturniid moth with sexual dimorphism in adult coloration: males are bright yellow, females reddish-brown to purple. Both sexes possess distinctive eyespots on the hindwings used in anti-predator displays. The caterpillars are gregarious, bright green with red and white lateral stripes, and possess venomous urticating spines that cause painful stings. Adults are nocturnal, lack functional mouthparts, and live 1–2 weeks. Populations have declined in parts of their range, particularly in New England, due to habitat loss and parasitism by introduced biological control agents.
Bombus
bumble bees, bumblebees
Bombus is the sole extant genus in the tribe Bombini, comprising over 250 species of bumble bees. These bees are distinguished by their ability to forage in cooler temperatures and lower light conditions than many other bees, including honey bees. They perform buzz pollination—vibrating their flight muscles to dislodge pollen from flowers—a behavior critical for crops such as tomatoes, peppers, and cranberries. Multiple Bombus species face significant population declines due to habitat loss, pesticide exposure, climate change, and pathogen transmission from commercial bee operations. Four California species (B. franklini, B. suckleyi, B. occidentalis, B. crotchii) are under endangered species protection consideration, with B. franklini feared extinct since 2006.
Ceratocampinae
Royal Moths
Ceratocampinae is a subfamily of giant silk moths in the family Saturniidae, commonly known as royal moths. Species are found exclusively in the New World. The subfamily includes large, strikingly colored moths with reduced or vestigial adult mouthparts; adults do not feed. Larvae are typically large and often bear prominent horns or tubercles, though they are harmless despite their fierce appearance. Representative genera include Citheronia (regal moth), Eacles (imperial moth), and Anisota.
Euphydryas chalcedona
Chalcedon Checkerspot, Variable Checkerspot
Euphydryas chalcedona, commonly known as the Chalcedon Checkerspot or Variable Checkerspot, is a butterfly species in the family Nymphalidae. The species exhibits considerable geographic variation in appearance across its range. It is found in western North America, with populations occurring in diverse habitats from coastal areas to montane regions. Like other members of the genus Euphydryas, it has been affected by the broader declines in butterfly populations documented across the western United States.
Pseudomedon
Pseudomedon is a genus of rove beetles (Staphylinidae) in the subtribe Medonina, established by Mulsant & Rey in 1878. The genus contains approximately 23 species distributed across the Palaearctic, Afrotropical, Australasian, Nearctic, and Oriental regions. Larval morphology has been described for at least one species, revealing two instars with distinctive anatomical features. Adults are rarely encountered in Europe and often require male genitalia analysis for accurate species identification.