Why Do Birds Migrate Like This?

Each autumn, billions of birds migrate from higher latitudes to the tropics. Instead of flying straight, they often take zigzag routes to utilize wind patterns, which helps them travel faster. Birds prefer land routes to avoid water, with small birds avoiding open seas and larger birds using thermals for lift. These migration patterns bring birds together at key hotspots along their routes.

Why do birds often take longer routes during migration?

• To take advantage of wind patterns

• To find more food

• To avoid other bird species

• To avoid predators

How does flying with the wind affect a bird's migration?

• It decreases their speed

• It increases their speed

• It makes them fly in circles

• It has no effect

Why do small birds generally avoid flying over water?

• They can't find food over water

• They prefer the scenery over land

• They are too small to survive storms

• They get lost easily

What are thermals and how do they help birds?

• Columns of rising air that help birds glide

• Strong winds that push birds forward

• Rain clouds that provide water

• Areas with abundant food

Where do birds often gather during migration?

• On mountain tops

• In urban areas

• At key straits and land bridges

• In dense forests