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Home Authors Posts by David Vallejo

David Vallejo

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I've got a degree in Biology and I'm Environmental Educator. Throughout my career I have been able to carry out several projects, specially focused on environment and its learning. My passion is to communicate about the environment and contribute to its conservation.
Fruit bats. By Jeffrey Paul Wade / Shutterstock.com

Perception in the animal kingdom: three unique information systems

David Vallejo -
Tiger swallowtail butterfly. By Scott Carroll

Invertebrates: importance, threats of extinction and conservation methods

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Two wolves fighting on snow. By David Dirga | Shutterstock.com

The social system of dominance in animals: hierarchy and submission

David Vallejo -
An adorable sugar glider (Petaurus breviceps) climb on the tree. By Arif Supriyadi | Shutterstock.com

8 fascinating animal facts about 8 different species

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Squirrel monkey in Ecuadorian jungle. By Ludmila Ruzickova | Shutterstock.com

How does animal behaviour develop?

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Big herd of wildebeest is about Mara River. By Gudkov Andrey | Shutterstock.com

Biogeographic movements: dispersal, dissemination and migration

David Vallejo -
Zebras. By Fabrizio Frigeni

What is homeostasis?

David Vallejo -
Iceland horses. By Fabian Burghardt

The domestication of animals: origins, general characteristics and stages

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Two foxes fight in a snowy environment in Zao, in the North of Japan. Zao is the home to the only fox village in the world, which is a sanctuary for rescued foxes. They are tame enough to get close to. By CloudVisual | Unsplash

Biological interactions: male-male competition during the breeding season

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A silhouettes of cranes in flight. By Sergey Uryadnikov | Shutterstock.com

The incredible journeys of migratory birds

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A cute koala. By Yatra | Shutterstock.com

What are the longest sleeping mammals?

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A herd of Eland or Taurotragus Oryx. By Sutirta Budiman

Population dynamics models: Levins and the source-sink theory

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Owls Are The Order Strigiformes Constituting 200 Extant Bird Of Prey Species Most Are Solitary And Nocturnal. By Ammit Jack | Shutterstock.com

A bird’s-eye view: why sight is their most developed sense

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Polar Bear (Ursus maritimus). By Vaclav Sebek | Shutterstock.com

Are species larger in cold environments? The principles of Bergmann’s rule

David Vallejo -
Giant panda climbing tree. By Hung Chung Chih | Shutterstock.com

Flagship species: Advantages and disadvantages of their management

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