Setting Up the Travel Pen
http://www.learner.org/jnorth/tm/crane/sl/9/TravelPen.pdf (booklet)
http://www.learner.org/jnorth/tm/crane/sl/9/TravelPen1.html (slideshow)
Migration: A Dangerous Journey
http://www.learner.org/jnorth/tm/crane/MigrationDangers.html
What Predators Go For Cranes?
http://www.learner.org/jnorth/tm/crane/Predators.html