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  • A brown and orange butterfly with white spots sits atop a dead flower head with its wings folded over its back.
    Apodemia mormo by Chris Grinter
  • An intricately-patterned caterpillar rests on a branch. Its bluish-green body is banded with black blotches and red, black, and light blue tubercles.
    Eupackardia calleta by David Wagner
  • Two brown moths rest on a white-petaled, yellow-centered flower.
    Schinia villosa by Chris Grinter
  • A green caterpillar with long brown spikes looks at the viewer.
    Adelpha eulalia by David Wagner
  • An orange-brown moth rests with its wings roof-like over its body. It is sitting on a yellow flower in the sun.
    Xanthothrix neumoegeni by Chris Grinter
  • A small green butterfly sits on a branch.
    Callophrys dumetorum by Chris Grinter
  • A brownish-gray caterpillar with yellowish warts, red spots, and dark longitudinal strips curls itself onto a skeletonized leaf. It is well camouflaged in its environment.
    Scevesia angustiora by David Wagner
  • A fluffy, golden-colored moth sits on the edge of an orange flower. Each of the moth's two top wings has one light-colored spot.
    Xanthothrix ranunculi by Chris Grinter
  • A green inchworm-like caterpillar makes its way along a green stem. It has a black spot on the side of its body that looks like an eye.
    Ponometia venustula by David Wagner
  • A blue butterfly obtains nectar from a yellow flower.
    Lycaena heteronea by Chris Grinter
  • A green caterpillar sits on a branch with many leaflets. The caterpillar looks almost like a dinosaur with its many curved spines, each bearing a combination of red, yellow, and metallic silver.
    Sphingicampa raspa by David Wagner
  • A butterfly sits with its angular wings open on a patch of dead grass. Its top wings are orange with black spots, while its bottom wings are mostly black with whitish, almost blue, edges.
    Polygonia interrogationis by Todd Gilligan
  • A brownish caterpillar with a green patch near its head sits on the edge of a leaf it has just eaten. The caterpillar's body is irregularly shaped with bumpy segments and a large protuberance near its head. Its appearance suggests the edge of a diseased or partially eaten leaf.
    Oligocentria “pallida” by David Wagner
  • A brown and gray moth sits in the shade of a partially closed, pale purple flower. Sunlight hits the moth's face, revealing its greenish eye.
    Schinia ligeae by Chris Grinter
  • A black caterpillar with pale pink bands rests on a plant stem. The pink bands become orange near its head, and the pink bands bear a deeper orange spot along the top of its body.
    Cucullia lilacina by David Wagner
  • A butterfly with black and white zebra striping rests with its wings open in the sunlight. The bottom wings have long black tails that become white about halfway down.
    Eurytides marcellus by Todd Gilligan
  • An orange and black butterfly gets nectar from a bright yellow flower blooming in the sun.
    Chlosyne palla by Chris Grinter
  • A yellow caterpillar with thin black bands and tiny black spots investigates a leaf on hairy stem.
    Phoebis sennae by David Wagner
  • A fuzzy brown and gray moth sits off-center within a yellow flower blooming in the sun.
    Heliolonche joaquinensis by Chris Grinter
  • A green caterpillar with thin, jagged black bands clings to a mostly-eaten, budding plant.
    Schinia gaurae by David Wagner
  • A gray butterfly gets nectar from small white flowers against a deep blue sky. The butterfly has small black spots on its wings, and on the edge of the bottom wing, it has orange spots, a single iridescent blue spot, and two black and white tails.
    Satyrium californica cygnus by Chris Grinter
  • A pair of grayish-white butterfly with black, orange, and blue spots mate atop a spiky flower head.
    Plebejus acmon by Chris Grinter
  • A brown caterpillar with white and red spots chews on the end of a stem. Each red spot bears numerous, long brown and black spines.
    Acronicta lupini by Chris Grinter
  • A small orange butterfly sits with its wings over its back on the edge of a leaf. The bottom of the butterfly's face and body are white, and its black eye looks right into the camera.
    Ancyloxypha numitor by Chris Grinter
  • A white butterfly with black spots along the edge of its top wings sits with open wings amongst green vegetation in the sun.
    Parnassius smintheus sayii by Todd Gilligan
  • A forest-green caterpillar with numerous white and brown spots of differing sizes sits still on evergreen needles. The caterpillar has a single stubby black horn protruding from the end of its abdomen.
    Sphinx dollii by David Wagner
  • An orange and black butterfly basks on a rock in the sun.
    Euphydryas anicia cloudcrofti by Chris Grinter
  • A yellow caterpillar with black and gray longitudinal stripes curls back its brown head and brown front legs in a defensive posture. Its gray and brown legs cling to a partially-eaten leaf.
    Dasylophia seriata by David Wagner
  • A black butterfly with pale yellow patches and spots rests with open wings on a dead piece of vegetation.
    Papilio zelicaon by Chris Grinter
  • A black butterfly sits with its wings in a "fighter jet" pose (top wings folded while bottom wings spread open) on a deep-green leaf. Each top wing bears a large white patch and a few tiny white spots near the wing tip.
    Notocrypta waigensis proserpina by Todd Gilligan

Welcome to The Lepidopterists’ Society! We are a non-profit international organization that promotes the study and appreciation of Lepidoptera (butterflies and moths). The Society was founded in 1947 on the principles of uniting amateurs and professionals in the scientific study of Lepidoptera. We currently have approximately 1,000 members in more than 40 countries, including researchers, educators, conservationists, collectors, watchers, photographers, and students of all ages. Although many professional entomologists are active in the Society, the majority of our members are amateur naturalists who are passionate about observing, collecting, and studying butterflies and moths both locally and globally.