Biogeography is the study of the distribution of animals.

A satellite image of a section of Antartica with brown stains of Penguin guano.

Tracking Penguin Colonies Through Their Droppings

Elizabeth Borneman

Researchers are using satellite imagery to map Antarctica’s penguin population and estimating their numbers based on the large guano stains left behind.

What is the Difference Between a Crow and a Raven

Caitlin Dempsey

Here are some ways you can determine the difference between the common raven (Corvus corax) and the American crow (Corvus brachyrhynchos).

Painted lady (Vanessa cardui). Image: NPS, public domain.

These Butterflies Have the Longest Known Migration Route

Caitlin Dempsey

Each fall, Painted Lady butterflies (Vanessa cardui) migrate from Europe to subtropical Africa. Individuals can travel as far as 4,000 kilometers.

Gray clouds hang in the sky over vegetation dotting the surface of the dune field. Bits of pink clouds appear below the gray and a hint of a rainbow appears in the sky.

Biogeography Definitions

Caitlin Dempsey

Here are some common terms in biogeography, a field of geography that studies the distribution of species.

Cover of Michael Hannah's book "Extinctions:  Living and Dying in the Margin of Error".

Review | Extinctions: Living and Dying in the Margin of Error

G.T. Dempsey

This book sets out, in some nine chapters, both the ‘turbulent’ journey of that one species living 3.7 billion years ago to the 8.7 million today and the human activity threatening that biodiversity.

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