Question

what are the factors that influence the number of migratory birds to decrease ?

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Answer 1

Answer:

Increasing temperatures, changing vegetations and extreme weather conditions lead to significant changes of the birds' essential habitats. In many cases these are likely reasons for the decline of bird populations and changes in migration patterns.

Answer 2

The factors that influence the number of migratory birds to decrease are:

The decline in natural water sources

• Water is the most important factor that attracts migratory birds.
• It is essential for migratory birds to breed and raise their young ones.
• Since the number of natural water bodies is decreasing at an alarming rate, the number of migratory birds is also declining rapidly.

Urbanization

• Urbanization is taking place at the cost of environmental destruction.
• Large areas of forests are being cleared up, many species of trees and plants are disappearing, natural water bodies are being covered up, etc.
• All of these are the main habitats of migratory birds.
• Since their habitat is vanishing, migration is also declining.

The drastic changes in climate

• Migratory birds migrate to regions that provide them with the factors favorable to them.
• Global warming, deforestation, ozone depletion, etc. is causing an extreme increase in temperature.
• Such temperatures are unsuitable for migration.