Worksheet 3.3 - Iowa State University

Migration & Dispersal
Worksheet 3.3
Supplemental Instruction
Iowa State University
AECL 365
Dr. Waldman
1.) What is migration? Why did it most likely evolve?
a. Name some benefits of migrating.
b. Name some costs of migrating.
2.) Name whether the listed bird is migratory (transient) or resident.
Small insectivores are ___________________
Shorebirds & seabirds are mostly ____________________
Seed eaters are ___________________
Flesh eaters are ___________________
3.) Adult birds have very high _____________________ when returning to the territory they
were in the previous year. Juveniles can locate the ______________ _______________.
4.) There are migration routes called _______________, which many birds utilize when
flying long distances to locate warmer weather.
5.) The _______________ _____________ is the
migration champion. This bird flies the entire globe
annually which ends up being 50,000 km every
6.) Ascension island is the ________________
___________ for all green sea turtles.
1060 Hixson-Lied Student Success Center  515-294-6624  [email protected] 
7.) List some mammals that migrate.
a. Briefly describe the process of gray whale migration.
8.) Salmon are an example of ____________________ migration because they are born in
freshwater, spend their adult life in marine waters, and then migrate back to freshwater to
breed/lay eggs/ die.
9.) Define the difference between orientation and navigation.
10.) What is dispersal? How is it different from migration?
a. ____________ ___________________ is movement away from the natal area.
Most vertebrate young will leave the home range of their parents.
11.) Explain the benefits and costs of dispersal.
12.) The dispersers are often times the _________-_________________ gender.
1060 Hixson-Lied Student Success Center  515-294-6624  [email protected] 