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Monarch Butterfly Annual Cycle
Image
Annual Cycle
Monarch Population in Mexico
Article
Annual Population Results
Monarch Butterflies at El Rosario Sanctuary in Mexico
Photo Gallery
El Rosario Sanctuary
Image of monarch butterflies roosting in a pine tree.
Slideshow
Magic of Monarch Migration
Image of monarch butterflies roosting in an oyamel tree in Mexico.
Slideshow
Measuring the Population in Mexico
Monarch Butterfly Range Map
Map
Migration and Range
Graph: Monarch Butterfly Winter Population Size
Graph
Monarch Butterfly Population
Image of monarch butterflies roosting in an oyamel tree in Mexico
Slideshow
Monarch Butterfly Sanctuary Tour
Monarch Butterfly Sanctuary Map
Map
Monarch Winter Sanctuaries
Monarchs, Mountains, and Moisture
Slideshow
Monarchs, Mountains, and Moisture
Stories from Mexico
Article
Stories from Mexico
Image of monarch butterflies roosting in Mexico
Slideshow
Surviving the Winter on Stored Energy
Temperature and Winter Survival
Slideshow
Temperature and Survival
The Monarch's Winter Habitat
Slideshow
The Monarch's Winter Habitat
Image of girl holding a monarch butterfly.
Article
True Tagging Stories
Image by Bruce Morrison
Slideshow
Why Overnight Roosts?
Conserving Monarchs
Article
Conserving Monarchs
How High Do Monarchs Fly?
Photo Gallery
How High Do Monarchs Fly?
Image of a tagged monarch butterfly
Photo Gallery
Tiny Tags, Big Discoveries
Too Cold to Fly?
Slideshow
Too Cold to Fly?
About Fall Monarch Migration Maps
Map
About Fall Maps
Monarch Butterfly by Elizabeth Howard
Article
Basking
Satellite image of Hurricane Katrina
Article
Hurricane Stories
Facts About Monarch Butterflies
Facts
Monarch Butterflies
Monarch Butterfly Nectaring on Spring Blossoms
Article
Nectar and Migration
The Overnight Roost
Article
Roosts: Scientific Findings
Citizen Science: Monarch Butterfly Migration
Slideshow
Citizen Science
How You Can Help Monarch Butterflies
Facts
Conservation: How You Can Help
Monarch Butterfly Wings
Photo Gallery
Monarch Wings Over Time
Image of a Monarch Butterfly in Flight
Article
Signs of Fall Migration
Chart: Monarch Butterfly Life Cycle
Image
Life Cycle
Live Wind Map
Map
Live Wind Map
A Dozen Butterfly Eggs
Photo Gallery
A Dozen Butterfly Eggs
Monarch Identification Infographic
Infographic
Can You ID?
monarch
Article
Dia de los Muertos Approaches
Energy Cost of Flight
Article
Energy Cost of Flight
The cremaster
Article
From Caterpillar to Chrysalis
Image of Monarch Butterfly Laying Eggs on Milkweed
Slideshow
How Do Monarchs Find Milkweed?
Monarch Butterfly Egg
Slideshow
How Does the Monarch Population Grow?
monarch
Image
Keeping a Lookout
monarch
Article
Keeping Track and Awaiting Arrival
monarch
Image
Many Flowers
monarch
Image
Many Fruits
Map: Monarch Butterfly Migration Pathway in Mexico
Map
Migration Pathway in Mexico
Monarch Arrival and Mexican Traditions
Slideshow
Monarch Arrival and Mexican Traditions
Monarch Butterfly Colony in Mexico as seen from above
Teaching Suggestions
Monarch Population
monarch
Image
Monitoring Arrival
Mystery: Chrysalids Under a Rock
Article
Mystery: Under a Rock
monarch
Image
Nature's Bounty
Nectar and Migration
Slideshow
Nectar and Migration
Population Distribution by Sanctuary
Map
Population Distribution
Monarch Butterfly Colony Selection 2010-2019
Graph
Population: Compare Winters
Monarch Butterfly Egg by Jody Vernay
Slideshow
Spring Migration: A Journey Driven by Needs
Monarch butterflies in Mexico in flight
Slideshow
Spring Migration: A Race Against Time
Temperature and Winter Survival
Teaching Suggestions
Temperature and Winter Survival
monarch
Article
There They Come!
Report Your Monarch Observations
Slideshow
Track Migration - What to Report
monarch
Image
Tracking Arrival
Monarch Butterfly Migration Map: Two Fall Migration Flyways
Map
Two Fall Migration Flyways
monarch
Article
Western Monarchs 2019 Fall Report #10
monarch
Article
Western Monarchs 2019 Fall Report #9
Image of monarch butterfly caterpillars
Slideshow
What Do Monarch Larvae Do?
Students with Monarch Butterflies
Photo Gallery
Who's Watching Monarchs?
Graph showing how many eggs one monarch butterfly can lay
Image
One Monarch, How Many Eggs?