Do Monarchs Rest at the Same Roost Sites Every Fall?

Read what Journey North's monarch expert Dr. Bill Calvert has to say about monarch roosts. Then write about and discuss these questions:
  • Dr. Calvert says monarchs clearly do not rest at the same sites every fall. What evidence does he give to back up his thinking?
  • Which factor does Dr. Calvert think is the most important to determine where monarchs will roost?
  • Dr. Calvert says that even the 'perfect' roost site will not always have monarchs roosting during the migration. Why?
  • What new things did you learn about fall monarch butterfly migration from Dr. Calvert's report?
  • What do you wonder about fall monarch butterfly migration after reading Dr. Calvert's report?

National Science Education Standards

Life Science
Organisms have basic needs. They can survive only in environments in which their needs can be met. The world has many different environments, and distinct ones support the life of different types of organisms. (K-4)

The behavior of individual organisms is influenced by internal cues (such as hunger) and by external cues (such as a change in the environment). (K-4)

An organism's behavior patterns are related to the nature of that organism's environment, including the kinds and number of other organisms present, the availability of food and resources, and the physical characteristics of the environment. (K-4)

Behavior is one kind of response an organism can make to an internal or environmental stimulus. (5-8)

Weather changes from day to day and over the seasons. Weather can be described by measurable quantities, such as temperature, wind direction and speed, and precipitation. (K-4)

National Geography Standards

The World in Spatial Terms
How to use mental maps to organize information about people, places, and environments.