


Monarch
Danaus plexippus
- KingdomAnimalia (Animals)
- PhylumArthropoda (Arthropods)
- ClassInsecta (Insects)
- OrderLepidoptera (Butterflies and Moths)
- FamilyNymphalidae (Brush-footed Butterflies)
- GenusDanaus (Tiger Milkweed Butterflies)
- SpeciesDanaus plexippus (Monarch)
In 3 days ~60% in a week ~90%
About the Monarch
The monarch butterfly or simply monarch (Danaus plexippus) is a milkweed butterfly (subfamily Danainae) in the family Nymphalidae. Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. It is among the most familiar of North American butterflies and an iconic pollinator, although it is not an especially effective pollinator of milkweeds. Its wings feature an easily recognizable black, orange, and white pattern, with a wingspan of 8.9–10.2 cm (3.5–4.0 in). A Müllerian mimic, the viceroy butterfly, is similar in color and pattern, but is markedly smaller and has an extra black stripe across each hindwing.
The eastern North American monarch population is notable for its annual southward late-summer/autumn instinctive migration from the northern and central United States and southern Canada to Florida and Mexico. During the fall migration, monarchs cover thousands of miles, with a corresponding multigenerational return north in spring. The western North American population of monarchs west of the Rocky Mountains often migrates to sites in southern California, but have been found in overwintering Mexican sites, as well. Populations are found further south in the Americas, and in parts of Europe, Oceania, and Southeast Asia. Wikipedia →
Recent sightings of Monarch in Boston
LIVEiNaturalistGlobal Distribution
Parks Where Found
Cities Where Found
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guatemala City | 🇬🇹 Guatemala | |
| 2 | Detroit | 🇺🇸 United States | |
| 3 | León | 🇲🇽 México | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Puebla | 🇲🇽 México | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | San Luis Potosí | 🇲🇽 México | |
| 8 | Chicago | 🇺🇸 United States | |
| 9 | Medellín | 🇨🇴 Colombia | |
| 10 | Lima | 🇵🇪 Peru |
Zoos & Centres Where Found
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Key West Butterfly and Nature Conservatory | 🇺🇸 United States |
Closest Relatives at Boston
Before you go
What are the chances of seeing a Monarch in Boston?
Possible
About 30% of wildlife watchers report a Monarch sighting in Boston on a given day, based on 1,229 verified sightings from GBIF citizen-science data. It is the 6th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
When is the best time to see a Monarch in Boston?
August
In that month about 50% of wildlife watchers report a Monarch in Boston on a given day, against under 5% in December to May, the lowest months.
What time of day is best to see a Monarch?
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Monarch sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Is Boston the best place to see a Monarch?
23rd of 55
Of the 55 cities where we can rate Monarch sightings, Boston ranks 23rd at about 30%. The best odds are in Guatemala City (Guatemala, about 50%), Detroit (United States, about 40%) and León (México, about 40%).
Which relatives of the Monarch live in Boston?
Same family: Nymphalidae
The closest relatives of the Monarch that you can see in Boston (family Nymphalidae, Brush-footed Butterflies) are Red Admiral (about 20%), American Lady (about 10%) and Painted Lady (about 10%), with each one's daily chance of a sighting.
Where does the Monarch sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Monarch is recorded against all the insects logged in Boston (1,229 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.




