Biogeography

Biogeography is the study of the geographical distribution of plants and animals.

A group of Canada geese swimming in the water. The sun is shining and some vegetation can be seen.

Canada Geese Migrate Less from Urban Areas

Caitlin Dempsey

With the expansion of urbanization, more Canada geese are becoming year round residents instead of migratory.

A dirt pathway through a sunlight filled forest with tall, thin trees. A shrub is in the foreground.

How Many Tree Species are There in the World?

Katarina Samurović

A team of scientists from the UK's Botanic Gardens Conservation International has compiled the first comprehensive list of all the world's tree species.

The upper body and head of a mustang at a horse stall with the BLM branding visible.

Geography of Wild Horses in the United States

Elizabeth Borneman

Wild horses continue to roam the Western United States as well as parts of the East Coast.

A small brown bird with light brown chest and white stripes above the eyebrow standing in a white platform.

Bewick’s Wren

Caitlin Dempsey

The Bewick's Wren (Thryomanes bewickii) is a small songbird native to North America.

California poppy (Eschscholzia californica). Photo: Caitlin Dempsey.

Endemic, Native, Non-native, and Invasive Species

Caitlin Dempsey

Learn what the terms endemic, native, non-native, or invasive mean for animals and plants.

Bald eagle flies away from the surface of the water with spray flying behind it. It grasps a fish in its talons.

Greatest Concentration of Breeding Bald Eagles in the Continental U.S.

Caitlin Dempsey

The San Juan Islands in Washington has the highest concentration of breeding bald eagles in the continental United States.

An angled view looking up the arms of a Saguaro cactus.

The Largest Cactus in the United States

Caitlin Dempsey

The Saguaro Cactus is the largest cactus in the United States

The beaver faces the camera. Its tail extends to the right and is cocked on its side, making the paddle-shape more visible.

Building It Back – Beaver Reintroductions Across the World

Katarina Samurović

Since the 1920s, beavers have been artificially re-introduced to many habitats across their former range.

California ground squirrel sitting on the trunk of a fallen oak tree.

Camouflage: Ways Animals Blend in With Geography

Caitlin Dempsey

Camouflage is a way for animals and insects to blend in with their surroundings in order to avoid detection.

Stray cats at the São Jorge Castle in Lisbon, Portugal.

Mapping Feral and Stray Cats

Mark Altaweel

Conservationists are using GIS and GPS to map out feral cat movements to understand impacts on native species.

Wildlife corridor for herpetofauna.

Introduction to Wildlife Corridors

Elizabeth Borneman

Wildlife corridors are overpasses and underpasses that connect natural regions and provide safe transit for migratory animals through human infrastructure.

Crow siting on a chain link fence.

The Growth of Crows in Cities

Katarina Samurović

Since the 1960s, more and more crows have been abandoning their rural winter roosts in favor of cities and towns.

Tufted Titmouse (Baeolophus bicolor). Photo: National Park Service, Public domain.

Kleptotrichy: Birds Who Steal Fur

Caitlin Dempsey

Scientists recently released their findings on why birds pull fur from animals, which is a potentially risky behavior.

A bison cow with her calf. Photo: Jesse Achtenberg, U.S. Fish and Wildlife Service. Public domain

Geography of American Bison

Caitlin Dempsey

Learn about the American Bison, which once roamed North America in large herds.

Set of maps illustrating how researchers used deep learning to map trees in West Africa.

Mapping Trees in West Africa

Mark Altaweel

Researchers used high resolution satellite imagery and machine learning to map trees in West Africa.

Ocotillo (left) and saguaro (right) are two plants found in the Sonoran Desert. Photo: National Park Service/Alice Wondrak Biel, Saguaro National Park, Public domain.

The Sonoran Desert is Losing Plants Due to Climate Change

Caitlin Dempsey

Between 1984 and 2017, a team of researchers utilized Landsat imagery to examine changes in vegetation in the Colorado Desert in Southern California.

Ghost Forest in North Carolina’s marshy Albemarle-Pamlico Peninsula. Image: Landsat 8, NASA, November 25, 2019.

Climate Change and the Expansion of Ghost Forests

Elizabeth Borneman

Along the geography of the East Coast of the United States, large swathes of forest are declining at increasing rates.

Cicada on a wooden post. Cicadas (Cicadidae, Magicicada) are 13- and 17- year periodical cicadas of North America. Photo: John J. Mosesso, USGS. Public domain.

Billions of Cicadas Will Be Emerging In the United States

Geo Contributor

Starting sometime in April or May, depending on latitude, one of the largest broods of 17-year cicadas will emerge from underground in a dozen states.

A black Eastern gray squirrel looks in a trash container. Photo: Caitlin Dempsey, CC BY 4.0

Anthropause: The Impact of Covid-19 Related Slowdowns on Wildlife

Katarina Samurović

Human-animal relations are extremely complex, and our presence - or absence - has greater power over the population dynamics than we commonly think

Alligator junipers (left) and Apache pine (right) are two types of conifers found in the sky islands in Chiricahua National Monument. Mountain lions and other wild cats can be found in this environment. Photo: NPS.

Sky Islands

Marques Hayes

Sky islands are like islands of unique ecosystems surrounded by contrasting environments.

From the Arctic to Mexico: Tracking the Epic Migration of Birds

Geo Contributor

In winter, more than 1 million shorebirds that breed in the Arctic will visit and move throughout the coastline of northwest Mexico.

Male ruddy duck swimming in water. Photo: John J. Mosesso, USGS. Public domain, Illinois, JULY 1, 2003.

Eco-fusion: the Mixing of Native and Non-Native Species

Geo Contributor

Species have moved (and have been moved) around the planet recombining to establish new or “novel” mixes of native and non-native species.

Book cover for Yellowstone Wolves

Review | Yellowstone Wolves: Science and Discovery in the World’s First National Park

G.T. Dempsey

This book is a collaborative effort to investigate the successes and failures of the re-introduction of wolves to Yellowstone National Park

A herd of caribou swims across the Noatak River in Alaska, heading south for the winter. Photo: NPS, Noatak National Preserve, Alaska, public domain.

New Maps For Ungulate Migration Routes Across the Western U.S.

Katarina Samurović

Federal and state wildlife biologists have come together to create a unique map of ungulate migrations across the American West.

A diagram showing areas of the world covered in forests and a graph using tree symbols to show which countries have the highest amount of forests.

Climate Change is Shrinking Forests in North America

Caitlin Dempsey

The impact of climate change is reducing the amount of habitat where the trees of North America can thrive.

White heron wading in the wetlands in Ironia, New Jersey. Photo: USGS, public domain

Flooding Can Help Protect Wetlands From Climate Change

Elizabeth Borneman

Targeted flooding may be one tool that conservationists and wetland restoration specialists have to make wetland areas more resilient in the face of climate change.