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National Zoo and Conservation Biology Institute

A female ruby-throated hummingbird sips nectar from a flower.

How Do You Weigh a Hummingbird?

See Spot. He's a small ruby-throated hummingbird with a big personality. He's also super smart and has mastered scale training.

The first cheetah cub born at the Smithsonian Conservation Biology Institute celebrated his 10th birthday last year, marking a decade of the facility's successful cheetah breeding program.

5 Milestones from a Decade of Cheetah Breeding and Conservation

Take a look back at some of the milestones the Smithsonian Conservation Biology Institute’s cheetah team has celebrated since the breeding and conservation program began.

January was a month full of firsts for giant panda cub Xiao Qi Ji. The growing bear played with enrichment toys, took his first bites of sweet potato and bamboo, and had his first encounter with snow!

January's Best Giant Panda Moments—In Video

January was a month full of firsts for giant panda cub Xiao Qi Ji. The growing bear played with enrichment toys, took his first bites of sweet potato and bamboo, and had his first encounter with snow!

Reptile keepers are warming up to a new monitor lizard this winter, a young Komodo dragon named Onyx.

Caring for Komodo Dragons, the World's Largest Lizards

The Smithsonian's National Zoo is warming up to a new monitor lizard this winter, a young Komodo dragon named Onyx. Reptile keepers have been working with these lizards for decades, including raising and training the Zoo's 22-year-old Komodo dragon Murphy.

In the midst of the pandemic, as the story goes, a team set out to bring swift foxes back to a land they had disappeared from more than 50 years ago.

How Tribes and Conservation Partners are Bringing Swift Foxes Back to Their Historic Range

In the midst of the pandemic, as the story goes, a team set out to bring swift foxes back to a land they had disappeared from more than 50 years ago.

A cheetah cub at the Smithsonian Conservation Biology Institute in Front Royal, Virginia.

8 Aww-Inspiring Videos of the Year's Best Animal and Conservation Stories

From a litter of chirping cheetahs and the birth of a lovable giant panda cub to groundbreaking coral reef research and new strides in animal care, there were many milestones to celebrate this year.

A sanderling, Aldrin, is one of the shorebirds being cared for by the Smithsonian's National Zoo's Bird House team.

Is the Secret to Saving Migratory Birds in the Meal Prep?

The Smithsonian’s National Zoo has many beaks to feed, including 23 species of migratory birds. Find out how keepers and nutritionists help individual animals stay physically fit and healthy, even as their physiology changes naturally with the seasons.

Tasi is a 4-year-old Guam rail and a marvel, considering that just a few decades ago his species nearly disappeared.

Meet Tasi, a Little Bird with a Big Purpose

We care for many rare and endangered species here at the Smithsonian Conservation Biology Institute in Front Royal, Virginia, including a little brown bird named Tasi. Tasi is a 4-year-old Guam rail and a marvel, considering that just a few decades ago his species nearly disappeared.

A bison on the Northern Great Plains.

I Spent the Summer Studying a Herd of Bison, And Here’s What I Learned

From May to August, I spent most days observing a herd of about 300 bison in Montana.

The Peruvian tern's desert camouflage makes it almost impossible to track, but that’s exactly what our research team set out to do. It would take us four months to survey more than 1,851 acres for the bird, battling sandstorms, stifling heat and impossible landscapes inside Paracas National Reserve — terrain that the tern has mastered.

Searching for the Invisible, Invincible Peruvian Tern

The Peruvian tern's desert camouflage makes it almost impossible to track, but that’s exactly what our research team set out to do. It would take us four months to survey more than 1,851 acres for the bird, battling sandstorms, stifling heat and impossible landscapes inside Paracas National Reserve — terrain that the tern has mastered.

This young Hartmann's mountain zebra colt, born in July 2020, was a first for the Smithsonian Conservation Biology Institute.

Our 3-month-old Zebra Colt is Earning His Stripes, One Butterfly and Biscuit at a Time

Our playful Hartmann's mountain zebra colt is a bundle of energy! Find out how the young colt spent his summer in this update from ungulate keeper Tara Buk.

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The Unexpected Arrival of a Teeny, Tiny (and Critically Endangered) Spider Tortoise

A "surprise" spider tortoise hatchling arrived July 5 at the Smithsonian's National Zoo's Reptile Discovery Center. Get the scoop from assistant curator Matt Evans.

A 28-day-old female Guam kingfisher chick at the Smithsonian Conservation Biology Institute.

Raising One of the World's Rarest Birds

Guam kingfishers are incredibly rare and difficult to breed, so we are thrilled to be closing out the breeding season with four new chicks. This has been our biggest year to date, and one of our busiest!

The Zoo's 1-month-old giant panda cub had its first veterinary exam over the weekend. Get the scoop from Laurie Thompson, assistant curator of giant pandas.

Giant Panda Cub's First Veterinary Exam

The Smithsonian's National Zoo's giant panda cub reached a big milestone over the weekend. The 1-month-old cub had its first veterinary exam, and all signs point to a healthy, strong cub. Get the scoop from Laurie Thompson, assistant curator of giant pandas.

Spindly legs and thick, red fur have earned them the nickname “foxes on stilts,” but maned wolves are neither fox nor wolf.

What the Rhythm of a Maned Wolf's Heart Reveals

Spindly legs and thick, red fur have earned them the nickname “foxes on stilts,” but maned wolves are neither fox nor wolf. Today, researchers are monitoring maned wolves' heart rates to learn more about these unique, charismatic canids.

A 41-day-old Guam kingfisher chick at the Smithsonian's National Zoo and Conservation Biology Institute. With fewer than 140 Guam kingfishers left in the world, all living in human care, every chick is precious.

Growing Up Guam Kingfisher

Breeding season is the most demanding time of year for the bird team at the Smithsonian Conservation Biology Institute, but it can also be the most rewarding. With fewer than 140 Guam kingfishers left in the world, every egg laid and chick hatched is a step closer to saving this species.

Tigers are the largest cat species in the world. Amur tigers (sometimes called Siberian tigers) are the biggest tigers, with males weighing up to 660 pounds and measuring up to 10 feet long from nose to tip of the tail.

What Does Tiger Poop Look Like? And More Tiger Facts

Do tigers purr? How far can they jump? And what does tiger poop look like? Sink your teeth into these fun facts about big cats.

Lemur leaf frogs, best known for their big, striking eyes, are critically endangered.

Meet the Lemur Leaf Frog

Meet the lemur leaf frog! These attractive amphibians — best known for their big, beautiful eyes — are critically endangered. The good news? Reptile Discovery Center keepers at the Smithsonian’s National Zoo are working to save them from extinction. Get the scoop on how they cracked the code on breeding this species from assistant curator Matt Evans.

A black-tailed prairie dog stands near its burrow.

Ecologists Dig Prairie Dogs, And You Should Too

Are prairie dogs pests or ecosystem engineers? It all depends on your point of view

researcher Tremie Gregory climbs high up a tree in Peruvian Amazon rainforest to set up a camera trap

How Scientists Are Uncovering the Secrets of Life in the Rainforest Canopy

Camera trap photos show arboreal animals living hundreds of feet above the ground

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