Opening the field guide
Limenitis archippus
A smaller monarch mimic, separated instantly by the black line that crosses each hindwing.
A black line arcs across each hindwing, cutting across the veins — a monarch has no such line
Smaller than a monarch, roughly 2.5–3.5 inches across
Orange with black veins and a black border spotted with white
Wet meadows, streamsides, marsh edges, and roadside ditches — anywhere its willow, poplar, and cottonwood host plants grow.
Flies with quick, erratic, flapping movements rather than the monarch's floating flap-and-glide. Resident year-round rather than migratory, and often patrols near willows and damp ground.
Monarchs are larger, lack the hindwing crossline, and sail with a flap-and-glide flight. In the southern US the darker queen is the closer mimic and also lacks the crossline.
Photograph the open hindwing if you can — the crossline decides it. Handling is unnecessary and risks damaging the wings.
Harmless to people. Long treated as a Batesian mimic, the viceroy is now understood to be unpalatable in its own right, making the resemblance mutually reinforcing rather than a bluff.
Widespread and not currently of conservation concern, though it depends on willow-lined wet ground that is easily drained or cleared.
Sources are linked below. Field marks vary with age, sex, season, region, light, and viewing distance.
Danaus plexippus
An orange-and-black milkweed butterfly whose populations make extraordinary seasonal journeys.
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Bombus spp.
A round, thoroughly furry bee whose hairy abdomen separates it from the shiny-backed carpenter bee.
Open field guide
Xylocopa virginica
A bumble-bee-sized bee with a bare, glossy black abdomen that tunnels its nest into wood.
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