Monarch Butterflies

News Spring 2025

Watch the season’s story unfold.

A blue sky behind fir trees containing clusters of monarchs

January 28, 2025

Monarch Butterflies

Monarch caterpillars in southern states, Western Monarch Count results

A monarch butterfly clings to a leaf

February 6, 2025

Monarch Butterflies

A 'very strange year'

Monarchs line both sides of a stream in Mexico's El Rosario Sanctuary

February 12, 2025

Monarch Butterflies

El Rosario colony leaves visitors speechless

A map displaying the first arrivals of monarch butterflies in each state in 2024

February 18, 2025

Monarch Butterflies

When will the monarchs arrive?

Graph showing overwintering monarchs in Mexico by year from 1993 to 2024

March 6, 2025

Monarch Butterflies

Eastern monarch population count announced

Two monarch butterflies on a Canary Island date palm

March 12, 2025

Monarch Butterflies

Monarch sightings pick up in Texas after departure from Mexico

Hundreds of monarch butterflies in front of a blue sky

March 17, 2025

Monarch Butterflies

Charting a new path: Journey North migrating to Monarch Joint Venture

A U.S. Drought Monitor map showing drought levels in Texas

March 19, 2025

Monarch Butterflies

Monarch movement along the Gulf, much of Texas in a drought

A monarch butterfly on a milkweed plant with a sidewalk behind it

March 27, 2025

Monarch Butterflies

Last of El Rosario's colony leaves for the season

A monarch butterfly on a short milkweed stem

April 2, 2025

Monarch Butterflies

Monarch movement held to Oklahoma border as we wait for milkweed

A green monarch chrysalis

April 10, 2025

Monarch Butterflies

Field reports from California, Arizona

Monarch eggs photographed from above on a short milkweed plant

April 16, 2025

Monarch Butterflies

Eggs in Missouri and Kansas, first adults in Illinois and Virginia

A black monarch chrysalis hangs from a plant

April 26, 2025

Monarch Butterflies

Surprising number of monarchs in Arizona's lower deserts

A male monarch butterfly up against a green leaf, with two small flowers to the left

April 30, 2025

Monarch Butterflies

Early arrivals are the talk of the town

A monarch butterfly on a white/yellow flower

May 14, 2025

Monarch Butterflies

Monarch migration reaches Michigan, New York, and more

A close-up photo of a monarch egg on a leaf

May 28, 2025

Monarch Butterflies

Maine, Manitoba, and more!

A monarch caterpillar tucked into a milkweed plant

June 4, 2025

Monarch Butterflies

All about the larvae

A monarch butterfly on a flowering plant with a branch nearby

June 12, 2025

Monarch Butterflies

Some western sightings provide ‘beacon of hope’

A monarch caterpillar looking out over the edge of a leaf

June 20, 2025

Monarch Butterflies

Quebec joins the club, caterpillar reports filling in

A monarch butterfly on a pink and yellow flower

July 15, 2025

Monarch Butterflies

Monarchs spread across the West

a monarch butterfly hanging from a leaf with a water droplet dripping from it and a yellow blurred background

July 31, 2025

Monarch Butterflies

Monarch Blitz going strong

Previous Season – Fall 2024