Life Span: 2-6 weeks during the summer, then around 6 months for the ones that migrate
Size: 7 to 10 centimeters
Weight: 0.27 to 0.75 grams
Location: Mexico, Canada, and the United States
How you can help save Monarch Butterflies
The monarch butterfly population was once more than a billion, but in the past 20 years have decreased by 90%. One of the main factors that has caused the decline in population is the removal of milkweed in neighborhoods and along streets. But in recent years, the monarchs have started to come back thanks to many devoted organizations and people working to prevent habitat loss and by planting milkweed.