alleryStart learning →Swallows were once thought to hibernate. Why do they vanish?
AThey dive into ponds
BThey leave as food runs short
CThey turn into other birds
DThey sleep deep in mud
Answer & Solution
Correct answer: B. They leave as food runs short
Swallows are not different from other birds; they leave when the country can no longer supply their natural food.
Keep practising Weather, Climate and Adaptations of Animals
Browse all Weather, Climate and Adaptations of Animals questions for Olympiad (Class 7), or explore more Science topics.
Related questions
Which bird is the known exception that truly hibernates?Eleonora's falcon breeds very late so that its chicks are fed on what?Jupiter's Great Red Spot is what kind of feature?What does the process of weathering do to rocks?The Little Ice Age caused what problem in Europe?In a 2016 brown bear study, what two signs sent bears into dens?Which factors set how long a mammal's hibernation lasts?When a habitat changes, which of three outcomes truly produces adaptation?