They are called "migratory animals"
http://www.thefreedictionary.com/migratory ex:eels.
nonmigrators
the seasonal movement of animals from one place to another is called migrations. Thet mostly move because scarcity of food and extreme temperature.
Migration is called migration because it refers to the movement of people or animals from one place to another in order to establish a new residence. The term comes from the Latin word "migrare," meaning "to move from one place to another."
The migrant workers are called migrant workers because they migrate. To migrate means to move. Migrant workers move from farm to farm, hoping to find work.
we humans need to learn about animals because we are animals ourselves.we are called vertebrates because we are animals that have backbones
In order to live and worship without restriction and/or because they felt 'called' to migrate, and/or they believed their personal prospects were better away from Europe.
Because we are human and animals
Birds that migrate are called migratory birds. Birds that do no migrate are called sedentary birds. Over 4000 species of birds migrate, mostly those native to colder regions.
Because it is home to billions of animals and humans, which are actually animals.
Animals are called consumers because they consume things, like plants or other animals. Consuming, by the way, means eating.
they are called animals because they are all different. on the other hand there is a group which animals are divided by these are: reptiles mammals amphibians birds & fish
herds because they are pack animals