Franz and Eleonore Sauer demonstrated that, when placed inside a planetarium so that the nighttime sky could be controlled, sylviid warblers oriented themselves in the proper migratory direction for that time of year by taking their bearings from the
A) moon.
B) planets.
C) stars.
D) sun.

Question

Quizplus · Accepted Answer

Sylviid warblers were shown to orient themselves using the stars when placed in a controlled environment like a planetarium, indicating their ability to navigate by celestial cues during migration.

Franz and Eleonore Sauer Demonstrated That, When Placed Inside a Planetarium