Why do you think some birds and animals are found only on these islands?
Some birds and animals are found only on islands because islands are isolated from the mainland by water, which prevents animals from migrating easily.
Over time, these isolated animals develop unique characteristics different from their mainland relatives.
The Andaman wood pigeon and Andaman hornbill, for example, evolved specifically in these islands and are not found anywhere else in the world.
Explanation
The chapter mentions that birds like the Andaman wood pigeon and the Andaman hornbill are only found in the Andaman and Nicobar Islands. Islands create isolated ecosystems where unique species evolve due to separation from mainland populations.
Solution Steps
Islands are isolated from the mainland by water, preventing easy migration of animals
Isolated animals develop unique characteristics over time, different from mainland relatives
Endemic species like Andaman wood pigeon and Andaman hornbill evolved specifically in these islands