Reading the Evidence: teacher key

Harpy Eagles, grade 10 edition, written for 10th grade. Researchers used nest cameras, bone fragments and backpack transmitters to learn about harpy eagles. The numbers are given, and a note says where sources differ.

Read the book. Print this page for the key.

Questions and answers

1. What did researchers use at 16 nests in Brazil's Mato Grosso region?
   • Camera traps and bone fragments (answer)
   • Only a telescope
   • Hunting traps
2. Of 306 prey remains found at 16 nests, which animals made up nearly half?
   • Fish and frogs
   • Two-toed sloths and two kinds of monkey (answer)
   • Opossums and iguanas
3. How many harpy eagle nest sites has The Peregrine Fund monitored in Panama since 2000, as of November 2026?
   • 5
   • 56 (answer)
   • 560
4. The 50 miles per hour figure comes from one report that does not say how it was measured. What does that tell you?
   • It was measured by radar
   • The number should be treated with care (answer)
   • It is a record for all birds
5. How much did the backpack transmitters weigh?
   • 60 to 105 grams (answer)
   • 6 to 10 kilograms
   • About 1 gram
6. In 2021 the IUCN Red List moved the harpy eagle from Near Threatened to what?
   • Least Concern
   • Vulnerable (answer)
   • Extinct

Words

• telemetry: remote tracking
• transmitters: radio devices
• territory: claimed area
• flagship: symbol species
• nestling: baby bird