Ecology

Ecology is the scientific study of the relations that living organisms have with respect to each other and their natural environment.

Food chain

A food chain shows how each living thing gets its food. Some animals eat plants and some animals eat other animals.

Food web

A food web depicts feeding connections in an ecological community . A food web can also be a couple of food chains interwoven.

Biome

Biomes are larger units of organization that categorize regions of

the Earth's ecosystems mainly according to the structure and

composition of vegetation.

 

Tropic pyramid 

A tropic level is defined as "a group of organisms acquiring a

considerable majority of its energy from the adjacent level

nearer the a biotic source."

Keystone species

A keystone species is a species that is disproportionately

connected to more species in the food-web.

 

Migration 

Animal migration is set apart from other kinds of movement

because it involves the seasonal departure and return of

individuals from one habitat to another. Many bird species

migrate to take advantage of global differences of seasonal

temperatures, therefore optimizing availability of food sources

and breeding habitat..

Migration

Land birds have a flight range of around 2,500 km

Shorebirds can fly up to 4,000 km

Some bird species undertake shorter migrations, travelling only

as far as is required to avoid bad weather or obtain food.