Home › Insecta › Nymphalidae › Monarch Butterfly (Danaus plexippus)
SPECIES PROFILE
Monarch Butterfly (Danaus plexippus)
Danaus
IUCN STATUS
Endangered
CONSERVATION STATUS
Endangered
CLASS
Insecta
GEOGRAPHICAL RANGE
Breeds throughout North America wherever milkweed grows; eastern population overwinters in Michoacán, Mexico; western population in coastal California
DIET
Herbivore (larval stage); adult: Nectarivore
HABITAT
Breeds in milkweed-rich meadows, fields, and gardens; migrates to oyamel fir forests in Mexico and coastal California groves
🔬 Classification
PHYLUM
Chordata
CLASS
Insecta
ORDER
Lepidoptera
FAMILY
Nymphalidae
GENUS
Danaus
📋 Description
SIZE
Wingspan 8.9–10.2 cm
COLORATION
Brilliant orange wings with black veins and borders; white spots along the black margins; hindwing white patch near the body
ADAPTATIONS
Toxic from milkweed cardenolides consumed as larvae; orange-black warning colouration (aposematism) deters predators; navigates using sun compass and magnetic field
🌿 Ecology
HABITAT
Breeds in milkweed-rich meadows, fields, and gardens; migrates to oyamel fir forests in Mexico and coastal California groves
DIET
Herbivore (larval stage); adult: Nectarivore
GEOGRAPHIC RANGE
Breeds throughout North America wherever milkweed grows; eastern population overwinters in Michoacán, Mexico; western population in coastal California
REPRODUCTION
Four generations per year; overwintering adults are the migratory generation living 6–8 months; breeding generations live 2–6 weeks; eggs laid only on milkweed
DIET DETAILS
Larvae eat exclusively milkweed (Asclepias spp.); adults drink nectar from flowers and also need water and minerals
⚠️ Threats & Conservation
PRIMARY THREATS
Milkweed loss from herbicide use in agriculture; deforestation of overwintering forest; pesticides; climate change disrupting migration timing
💡 Interesting Facts
1
The Monarch Butterfly migrates up to 4,800 km from Canada to Mexico guided by a sun compass in its antennae — no individual completes the round trip in its lifetime.
2
No single Monarch butterfly completes the full round trip migration; the southbound generation that reaches Mexico in autumn is 3–4 generations removed from the one that left the previous year.
🔭 Sighting Guide
📍 BEST PLACES TO SIGHT
Monarch Butterfly sanctuary at Pacific Grove, CA, has overwintering clusters on Monterey cypress trees
Chincoteague National Wildlife Refuge, VA, sees large Monarch concentrations during autumn coastal migration
Peninsula Point, MI, on Lake Michigan is a prime autumn Monarch migration watch site in the Great Lakes
🗓️ BEST TIME TO SIGHT
August to October along the Lake Erie and Lake Michigan shorelines in OH and MI; Pacific Grove, CA, for overwintering clusters.
🎯 SIGHTING TIPS
Late summer to autumn. Migration peaks August to October at coastal watch sites and milkweed patches across the Midwest.
