ENEndangeredPartial review

Monarch Butterfly (migratory)

Danaus plexippus plexippus

At a glance

IUCN category
EN · Endangered
Animal group
Invertebrates
Population trend
Decreasing
Last verified

Conservation overview

The migratory monarch is a population of the monarch butterfly famous for one of the most spectacular insect migrations on Earth. It is assessed (as the migratory subspecies) as Endangered.

Generations of monarchs travel thousands of kilometres between breeding and overwintering grounds.

Range & habitat

North America, with famous long-distance migrations to overwintering sites in Mexico and coastal California.

Major threats

Threats below are drawn from the authoritative sources listed on this page. For the current, complete assessment, see the IUCN Red List.

  • Loss of milkweed and breeding habitat
  • Loss and degradation of overwintering forest
  • Pesticides and climate extremes

Why it matters

An icon of insect migration, the monarch is a flagship for pollinator conservation and a visible barometer of habitat loss across an entire continent.

The 2022 Endangered listing applies to the migratory monarch subspecies. The wider species was assessed separately; confirm the relevant entry on the live IUCN list.

Sources

Frequently Asked Questions

What makes the monarch migration special?
Monarchs travel thousands of kilometres across North America, with overwintering generations massing in forests in Mexico and coastal California — a multi-generational journey unmatched among butterflies.
Why is the migratory monarch Endangered?
Published assessments cite the loss of milkweed (its caterpillar food) and breeding habitat, degradation of overwintering forests, pesticides, and climate extremes. See the IUCN Red List.

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