Butterflies as Ecosystem Indicators

Ross studies butterflies to assess forest diversity. He observes unique features like special glands emitting odors. In 10 days, he records over 300 insect species, indicating a rich ecosystem.

Why are butterflies considered good indicators of forest diversity?

• They are colorful and easy to spot.

• They have a short lifespan.

• They reflect the health of the ecosystem.

• They are easy to catch.

What unique feature do some butterflies have to protect themselves from predators?

• Fast flying speed

• Special glands emitting odors

• Bright colors

• Camouflage abilities

What is the purpose of the noxious odor emitted by the butterfly's glands?

• To communicate with other butterflies

• To deter predators

• To attract mates

• To mark territory

How many insect species did Ross record in 10 days?

• Over 100

• Over 400

• Over 200

• Over 300

What does the variety of butterfly species indicate about the forest?

• It has a limited food supply.

• It supports a rich web of life.

• It is a newly formed ecosystem.

• It is isolated from other ecosystems.