Tracking the Monarch Migration by Smartphone
In the app: the whole story at your level, listening, the quiz and the word cards.
The same story at six levels
How the first sentence reads at every level, from A1 to C2.
- A1
The U.S. Fish and Wildlife Service watches butterflies.
- A2
The U.S. Fish and Wildlife Service is putting very small tags on monarch butterflies.
- B1
The U.S. Fish and Wildlife Service is attaching tiny solar-powered Bluetooth tags to monarch butterflies.
- B2
The U.S. Fish and Wildlife Service is attaching tiny solar-powered Bluetooth tags to monarch butterflies during their autumn 2026 southward migration to wintering habitats.
- C1
As autumn 2026 sends monarch butterflies south toward their wintering habitats, the U.S. Fish and Wildlife Service is attaching tiny solar-powered Bluetooth tags to the insects.
- C2
As autumn 2026 sends monarch butterflies south toward their wintering habitats, the U.S. Fish and Wildlife Service has been fitting them with solar-powered Bluetooth transmitters—short-range wireless tags that allow electronic devices to exchange signals over short distances.
Key words
Words from the B1 text, with their meaning.
- attach
- to fasten or join one thing to another
- habitat
- the natural place where a plant or animal lives
- transmitter
- a piece of equipment that sends out radio or television signals
- route
- a way or path taken to get from one place to another
- migrate
- to travel to a different part of the world at the same time each year
- detect
- to notice or discover something, especially using special equipment
Rewritten with AI from facts reported by US Fish and Wildlife Service. Read the original for the full report.