Peregrine Falcons are managed as protected species by the Idaho Department of Fish and Game


Live streaming video courtesy of
Fiberpipe Data Centers

Nest updates

June 30

Now that the chicks have fledged, we have replaced the video feed with a slide show. We thank local residents Bill Myers and Jimmy Hague for capturing these images on their cell phones. Both photos were taken about two blocks from the nest box soon after fledging. The bird on the ground was in the Grove; the other one was perched on a sign at 8th and Main streets.

If you see the falcons, send your photographs (medium resolution) to and include your name and contact information.

We have had no reports from the Idaho Department of Fish and Game about rescue calls in the past two weeks.

June 16

The chicks fledged over the weekend. The Idaho Department of Fish and Game received two calls about birds on the ground. On Saturday, the fledgling eventually flew from the sidewalk into a tree and so it was not retrieved. On Sunday, the young falcon could not be located when the rescuer arrived, but three birds (the fledglings?) were observed atop the nearby Wells Fargo building while one bird (an adult?) was flying overhead.

If anyone has photographs of the new fledglings, we will create a slide show for this page. Please send your photographs (medium resolution) to and include your name and contact information.

June 10

The chicks are out on the ledge almost exclusively now as they prepare to take their first flights, which should begin next week. Fledging can be risky for young birds because they are unpracticed in the art of flight and may find themselves in unsafe situations, especially when they land on the ground.

After fledging occurs, authorized personnel should be notified if a chick is injured or in danger. If you encounter a chick on a street or sidewalk, do not attempt to capture or handle it. Instead, call:

  • Fish and Game at 208-465-8465 (8 a.m.-5 p.m. Monday-Friday)
  • Idaho State Police at 208-846-7500 (after business hours, weekends and holidays)

Skilled personnel will assess the bird’s condition and return it to One Capital Center where the youngster can resume its journey to independence. The falcon parents will carefully watch the fledging process and provide food for the chicks until they learn to hunt for themselves.

June 2

One of the chicks hopped out of the nest box last Friday and took a short stroll on the concrete ledge. The nail-biting season for FalconCam viewers has begun!

The chicks will be fledging in a couple of weeks so they are curious about the world outside the box. Many viewers worry the young birds could fall or be blown off the 14-story building. While this is a possibility, it is not likely. The chicks are simply doing what comes naturally. Their instinct is to fly, so like toddlers learning to walk, they must test their limits.

They will spend more time now out of the box and on the ledge, which is about 40 inches wide and extends the length of the building. Here, they will have plenty of space to vigorously flap their wings and take short practice hops to prepare for fledging. The north-facing ledge also provides shade and ventilation on hot days.

May 27

The rate at which these birds grow during the 45-day period from hatching to fledging never fails to impress. Chicks weigh a mere 1-1/2 ounces (40 grams) when they emerge from their shells, yet they will be full-grown when they leave the nest. By the time they fledge, these fluff balls will be 18 inches tall and have a wingspan of more than 3 feet!

Male falcons grow up to be smaller than females, weighing about 21 ounces (600 grams) at fledging. Females weigh about 35 ounces (1,000 grams). The males' small size means they will develop faster and often leave the nest sooner than their bigger sisters.

May 15

Although the chicks appear to be alone at times, at least one adult is close by, out of camera range but ready to spring into action at any threat. The adults have a lot of time and energy invested in their offspring and are not likely to abandon or neglect them.

What happens if one of the adults is hurt or dies? Could the other one raise these demanding youngsters alone?

When something happens during incubation, the eggs usually must be abandoned so the adult can survive. After hatching, it would be possible to raise the chicks solo, but it would not be easy. These chicks have the best chance to survive if both parents are present to provide food, protect them from predators, and help them become independent.

May 9

From Monday to Wednesday, three chicks successfully emerged from their eggs. The fourth egg is not expected to hatch. The adults will eventually roll the egg out of the scrape and off to the side of the nest box. The chicks are not yet capable of regulating their own body temperatures, so they will need their parents to keep them warm for about 10 days.

The yolk inside the egg, which nourished the embryos during incubation, was absorbed into the body cavity of the chicks immediately prior to hatching. Although the yolk keeps the chicks well-nourished for a few days, their begging instinct kicks in right away. The adults feed the chicks bits of food by tearing off small chunks of meat and delicately placing them in the chicks’ beaks.

From our experience of successfully raising thousands of falcons in captivity in the last 40 years, we know that a begging chick is not necessarily a hungry chick. The adults know how much food each chick requires. As effective as The Peregrine Fund is at feeding chicks, we can’t do it as well as the natural parents.

May 5, 3:00 p.m.

The first young Peregrine Falcon has just hatched in downtown Boise! We also saw a second egg that has pipped, which means that it should be hatching soon as well. Pipping is the first stage of the actual hatching process.

The first egg was laid on March 26th and the fourth and final egg was laid on April 2nd when incubation began in full earnest. If all of the eggs were fertile they should hatch within the next day or so.

May 2

Hatching will be exhausting work for the tiny chicks but they develop biological tools especially for this purpose. An egg tooth forms on the top of their beaks. When they are ready to emerge, the chicks use this sharp structure to pierce the inside membrane and the shell. This small hole allows oxygen to flow into the egg and fill their lungs. This stage of hatching is called “pipping.”

The adults know that pipping is about to begin when they hear the chicks vocalizing from inside the eggs. The chicks also develop a large pipping muscle in the back of their necks that gives them the strength to chip their way out. Usually, hatching begins about 48 hours after pipping. The chicks will punch a dime-sized hole in the shell and then use their egg tooth to cut the top off the shell. The egg tooth falls off a few days later and the pipping muscle disappears.

April 23

Can you tell the male and female apart? It can be tricky unless the birds are standing side by side – in that case, the female will be noticeably larger than the male. This characteristic, which is common to most birds of prey, is called “reverse sexual size dimorphism.”

When the female is incubating, the male is fulfilling his role as protector and provider. To humans, the notion of sitting still for long periods of time during incubation seems intolerable, but for birds of prey of both sexes it is normal behavior. They spend most of their time sitting still, conserving energy until it is time to hunt for food, defend their territory, court, or raise their young. You may catch the falcons napping once in a while, but they are alert during incubation.

April 15

From time to time, the birds stand up and rotate the eggs. This is an important chore, as it ensures that the eggs are uniformly warmed and prevents the embryos from sticking to their shell, which could be a problem during hatching.

An egg is an amazing creation. It is fragile enough for a tiny chick to peck its way out, yet strong enough to withstand the weight of an incubating adult. That wasn’t always true. In the 1960s, scientists discovered that the pesticide DDT caused physiological problems in female Peregrine Falcons, resulting in thin-shelled eggs that broke during incubation.

DDT was banned in 1972 and The Peregrine Fund helped recover this once-endangered species with captive breeding and releases to the wild. It was one of the most successful conservation efforts in history.

April 8

With the arrival of egg #4 on April 2, incubation is in full swing. The incubation period is 33-35 days. With a body temperature of 104 degrees F, the adults are able to keep the eggs warm even in cold spring weather. During incubation, a “brood patch” develops on the chests of the adults. This bare spot keeps the eggs in close contact with the parents’ bodies for maximum heat.

The patch remains for up to two weeks after the eggs hatch because new chicks are unable to regulate their own body temperatures for that long and continue to depend on their parents for warmth. The brood patch fades and feathers fill back in as the youngsters grow older.

April 1

No fooling, there are now three eggs in the nest. Will there be a fourth, or even a fifth? Typically, the falcons do not begin incubating until the third or fourth egg arrives so that all the eggs hatch about the same time. Otherwise, the bigger, first-hatched chick would have an unfair advantage at feeding time over the smaller, last-hatched chick. You will see both adults sitting on the eggs at times over the next few days but incubation does not begin in earnest until the laying period ends.

The eggs are capable of withstanding temperatures below freezing. The chicks do not develop much inside the egg until incubation begins. Occasionally, the eggs will appear to be left alone for short periods but, even when the adults are out of camera range, you can rest assured that at least one is always nearby to protect the nest.

March 26

Welcome to the 2014 FalconCam season! This is the sixth year a webcam has provided you with a front-row seat for watching the daily activities at a nest box in downtown Boise.

We are launching the season with big news – the female Peregrine Falcon laid her first egg today! This is the earliest date for a first egg since the webcam was installed in 2009. The timing is almost two weeks earlier than last year, which also was earlier than ever. Wild birds keep their own schedules.

We appreciate your patience as we continue working on this page. The video can take up to a minute to load and the audio is not yet available. You may notice various refinements in the days ahead.

March 19

We know many of you are anxiously waiting for this year's FalconCam and we want to let you know that it's coming soon! Birds have been observed around the nest box in downtown Boise recently. We are now waiting for Fiberpipe, which generously donates the video portion of this project, to finish the technical side of things before launching the 2014 season.

The photo of the falcons at the nest was taken by Bob Young on March 12.

Peregrine Falcon recovery history

A slide toward extinction

Dented, thin-shelled Peregrine eggs, a result of DDT contamination in the parents' food.

When The Peregrine Fund was founded in 1970, Peregrine Falcons were in danger of extinction in North America and Europe. The falcons had disappeared from the eastern half of the United States and were in serious decline west of the Mississippi River.

At the first Peregrine Conference in 1965, biologists concluded that the unprecedented population crash coincided with the widespread use of DDT and other pesticides. Many experts and falconers believed that breeding the birds in captivity would keep the species alive should the wild population become extinct. At a second meeting in 1969, participants asked the United States, Canada, and Mexico to protect Peregrine Falcons. In 1970, the U.S. Department of Interior listed the Peregrine as endangered. The use of DDT was banned in 1972. The Peregrine Falcon remained in the endangered category when Congress approved the Endangered Species Act in 1973.

Peregrine Palace

The first captive breeding facility was built at Cornell University, where Dr. Tom Cade had recently joined the faculty. In 1970, a 40-chamber barn, dubbed “Peregrine Palace,” near Cornell’s Laboratory of Ornithology became the home of the recovery effort. The same year, two schoolboys sent money to Tom to save the falcon from extinction. He deposited in a fund for that purpose, and The Peregrine Fund was born.

The first fostered Peregrine chicks were raised by wild parents in Colorado's Royal Gorge in 1974. (The temporary coloring on their heads was used for identification.)

The captive breeding effort began with birds from the wild and donated by falconers. The first breeding season occurred in the spring of 1971.

That first season wasn’t easy. Only a few birds of prey had ever been bred successfully in captivity at the time and useful information was limited. But a few early cases proved that it could be done. Over the years, Tom and his crew persevered, pioneering innovative techniques to produce viable eggs, healthy chicks, and fledglings capable of surviving in the wild.

In 1974, four of the 23 Peregrine Falcons produced that year were released to the wild to see what would work best on a large scale: hacking, fostering, cross-fostering, and released adult mated pairs. Two chicks were placed in the nest of an adult pair that had lost their eggs earlier in the season. The foster parents successfully raised them to fledging. The other two were released using the hacking method using a box, platform, or other structure and supplemental feeding until independence.

One of many western hack sites; this one was carried to the cliffside by helicopter.

Hack sites proved to be a highly effective way to release young birds. Biologists scaled rugged mountains and rappelled down steep cliffs to install hack boxes where juvenile falcons would have a good chance to survive. Hack-site attendants braved howling winds, snow and cold, bears, insects, and rattlesnakes to feed and monitor the young birds until they dispersed. From 1974 to 1997, nearly 4,000 captive-bred falcons were released to the wild throughout the United States.


Always a rare bird even in the best of times, the Peregrine Falcon now is found throughout nearly all of its historical range in North America, as well as in areas where it never was before. To the delight of urban dwellers, the falcons have adapted to tall buildings reminiscent of their natural cliff habitat. Building ledges and artificial nest boxes provide places to rear their young and pigeons and city birds like pigeons are an excellent food source.

In 1999, the people who had participated in what became one of the most successful recovery efforts in history gathered for a celebration at The Peregrine Fund’s World Center for Birds of Prey in Boise, Idaho. The occasion: official removal of the Peregrine Falcon from the U.S. Endangered Species List.

Jamie Rappaport Clark, director of the U.S. Fish and Wildlife Service, presented a gift to Peregrine Fund President Bill Burnham in honor of the proposed delisting of Peregrine Falcons in 1999.

Public support has been vital to the falcon’s recovery from the beginning. Rachel Carson’s landmark book, “Silent Spring,” captured the public’s attention about an alarming loss of wildlife. As people learned more about the plight of the Peregrine Falcon in articles, media reports, books, and films, they responded with money and support. Through the years, thousands of individuals and many falconry clubs, conservation groups, federal and state agencies, and private businesses and landowners became partners in the project.

As it did with DDT, the Peregrine Falcon continues to be an excellent indicator warning of contaminants in the environment, such as possible effects of the 2010 oil spill in the Gulf of Mexico. Research on this tenacious bird now spans a half-century, providing a wealth of data that can be used to ensure the health and safety of many species, including humans.

Peregrine Falcon facts


Falcons do not build nests. Eggs are laid and incubated in a “scrape,” which the falcons build by pushing the gravel out behind them with their legs.


The birds “bow” to each other by leaning forward with their heads low and their tails held high. They make an “ee-chupping” sound. Both the male and female bow and vocalize over the scrape and may touch bills. The male offers food to the female, which takes it from his talons or beak, often accompanied by ee-chups or loud vocalizations.


Peregrine Falcons generally keep the same mate from year to year, but if one dies, the surviving bird will seek another.


A typical clutch is three to four eggs, which are incubated for 32 to 35 days. The parents will use their beaks to roll and shift the eggs periodically during incubation. The male assists by sitting on the eggs while the female leaves to eat. The eggs will not hatch if they are infertile or the young dies during incubation.


Called an eyas, a chick stays warm under its parent during the brooding period. Chicks are fed by both parents, who make sure each chick receives enough to eat. They are in the nest for six to seven weeks.


Chicks prepare to leave the nest by flapping their wings in the nest, then taking short test flights. For about six weeks, they continue to be fed by their parents while honing their flying and hunting skills before striking out on their own.

Learn more about Peregrine Falcons in our Explore Raptors feature!

Frequently Asked Questions

Where are the nest and webcam located?

The camera is attached to a nest box on the 14th floor of the One Capital Center Building, 10th and Main streets, in downtown Boise. The box is on a ledge on the northwest corner of the building. The webcam may be viewed on a television monitor in the lobby.

What happened at this nest last year?

Here are some significant dates from previous years:

Camera startedMarchMarch 10March 22March 21
First egg laidApril 10April 16April 7? (out of sight)
Last egg laidApril 17April 23April 14April 30
Hatching beganMay 17May 25May 16June 4
Last hatchMay 18May 26May 17June 4
First fledgeJune 25July 1June 24July 13
Camera turned offAugustAugustAugustAugust 24

Are these birds endangered?

The Peregrine Falcon was removed from the U.S. Endangered Species List in 1999. The Peregrine Fund was established in 1970 to recover the species by producing young birds in captivity and releasing them to the wild. The population of the species continues to be monitored by the U.S. Fish and Wildlife Service and individual states.

How did the falcons become endangered?

The population had been decimated by DDT, a pesticide that thinned the eggshells of many types of birds of prey, including the Bald Eagle. The use of DDT was banned in the United States in 1972.

How are they doing in Idaho?

In 2009, The Idaho Department of Fish and Game removed the Peregrine Falcon from the state endangered species list on the 10th anniversary of the federal delisting. Like all birds of prey, the Peregrine Falcon remains fully protected by state and federal law.

When did recovery begin in the state?

Peregrine Falcons were essentially gone from Idaho by 1974. Starting in 1982, captive-bred falcons were released to the wild in Idaho and nearby states. In 1995, the raptors were again documented as a breeding species and releases were discontinued. Eight falcons were released in downtown Boise in 1988 and 1989. Today, there are about two dozen breeding pairs scattered around the state.

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For this season, the video should work on both desktop and mobile systems, regardless of operating system or browser. If you have difficulty viewing the video, please contact

Weather at the nest

Peregrine Falcon research and literature

Can't see the video?

For this season, the video should work on both desktop and mobile systems, regardless of operating system or browser. If you have difficulty viewing the video, please contact

Learn about Peregrine Falcons


Two young boys first put the “fund” in The Peregrine Fund by sending money to founder Tom Cade in 1970. You can continue their legacy — donate today to conserve birds of prey around the world.

peregrine gifts