What the Trackers Found: teacher key

Philippine Eagles, grade 8 edition, written for 8th grade. Scientists estimate how many Philippine eagles remain and follow adults with GPS trackers. Read what the tracking showed about their territory.

Read the book. Print this page for the key.

Questions and answers

1. How many eagles did the tracking study follow?
   • Six (answer)
   • Sixty
   • Two
2. How much of the time did the tracked adults spend outside their core territory?
   • 10 to 20 percent
   • 75 to 80 percent (answer)
   • Almost none
3. What is the 2023 estimate of 392 pairs based on?
   • A habitat model (answer)
   • A count of every nest
   • A photo from the air
4. How much forest cover do Philippine eagles generally prefer?
   • 10 to 20 percent
   • 40 to 50 percent
   • 70 to 80 percent (answer)
5. Did the 2023 study count every eagle?
   • Yes, it counted them all
   • No, it used a model and tracked eagles (answer)
   • It counted only the nests

Words

• estimated: a careful guess
• transmitters: tracker devices
• fidelity: staying in place
• habitat: natural home
• territory: home area