Podcast
Questions and Answers
Match the following reasons for animal migration with their descriptions:
Match the following reasons for animal migration with their descriptions:
Find food = One of the reasons for animal migration Seek a partner = One of the reasons for animal migration Warmer weather = One of the reasons for animal migration Hibernate = One of the reasons for animal migration
Match the following features with the North American monarch butterfly's migration:
Match the following features with the North American monarch butterfly's migration:
4,000 kilometers = Distance traveled by monarch butterflies during migration California or Mexico = Destination where monarch butterflies reach during migration Eyes and sun position = How monarch butterflies determine their way during migration Population decline = Current issue faced by monarch butterflies
Match the following statements with their correct endings:
Match the following statements with their correct endings:
Monarch butterfly's ability to determine direction = Is based on time of day and sun position Human activity impact on monarch butterfly population = Main reason for population decrease Natural environment destruction = Caused by cutting down trees and using chemicals Professor Eli Shlizerman's role = Lead scientist in solving monarch butterfly migration mystery
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Study Notes
Migration
- Many animals migrate from one place to another at certain times of the year to find food, seek a partner, or in search of warmer weather.
- One of the most notable migrations is that of the North American monarch butterfly.
Monarch Butterfly Migration
- Every autumn, millions of monarch butterflies migrate around 4,000 kilometers south to California or Mexico.
- The monarch butterfly uses its eyes to measure the position of the sun and tell the time of day to determine its direction.
- The combination of time of day and sun position allows the butterfly to navigate to its wintering grounds.
Threats to Monarch Butterfly Population
- The monarch butterfly population has crashed by as much as 90 per cent in the last few years.
- Human activity is the main reason for the decline in monarch butterfly population.
- Human activities that harm the monarch butterfly population include:
- Destroying natural environments by cutting down trees.
- Using chemicals that kill the plants that monarch caterpillars eat.
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