Garden warblers, a small migratory songbird, hatch in northern Europe and migrate to sub-Saharan Africa in their first autumn — typically without their parents, since adults often depart earlier. Experiments have shown that hand-raised birds with no exposure to older birds nevertheless attempt to migrate at the appropriate season, with an inherited tendency toward the correct heading and duration.
Which conclusion most logically follows from the passage?
- A
Migration in garden warblers depends entirely on direct social transmission from parents
- Bcheck_circle
Aspects of migratory behavior in this species can develop without learning from older individuals
- C
Garden warblers only migrate when accompanied by their parents
- D
Hand-raised garden warblers are unable to migrate at all
Explanation
Hand-raised birds without exposure showing migratory tendencies supports B. A, C, D contradict the passage.