CalFalconCam @CalFalconCam Twitter profile

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CalFalconCam

4 years

Raise your hand if you want to watch all three of our cams at the same time! We are very excited to announce the launch of our new website: Come check it out, and learn all about Annie, Grinnell, and their history at @UCBerkeley !

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CalFalconCam

@CalFalconCam

2 years

“Loafing” is the scientific term for when a bird is displaying relaxed behaviors not specifically related to feeding, breeding, or predator evasion. As you can see, New Guy really knows how to loaf. We’re hoping for some uneventful weeks full of loafing ahead of us

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CalFalconCam

@CalFalconCam

2 years

When a mated Peregrine dies during the breeding season, the most likely outcome of the nest is abandonment. In rare cases, a new mate can come in, establish a bond with the remaining individual, and adopt the chicks. It is *possible* that we are witnessing this right now.

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CalFalconCam

@CalFalconCam

2 years

We are all deeply saddened to report that Grinnell was found dead in downtown Berkeley this afternoon. We are devastated and heartbroken. His cause of death isn't known, but he was probably struck by a car given where we found him.

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CalFalconCam

@CalFalconCam

3 years

Proud dad!

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CalFalconCam

@CalFalconCam

4 years

By popular demand, here's the moment Grinnell met his chicks.

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CalFalconCam

@CalFalconCam

2 years

Uh... this is something we've never seen before. Annie is... back! We've never, in our years of monitoring Peregrine nests had a female disappear during the peak of breeding season and reappear a week later like nothing had changed. Especially with so much competition around.

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CalFalconCam

@CalFalconCam

2 years

Annie must feel alright about the new guy. Egg number 3 just dropped!

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CalFalconCam

@CalFalconCam

2 years

The new male briefly incubated the eggs. We’re still hoping to see prey deliveries, but this is a very good sign.

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CalFalconCam

@CalFalconCam

17 days

Welcome to the family, Chick 4!!! This is the first time Annie has ever hatched all four eggs she's laid. It should make for a very chaotic and exciting year!

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CalFalconCam

@CalFalconCam

1 year

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CalFalconCam

@CalFalconCam

19 days

Talon-holding with Mom

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CalFalconCam

@CalFalconCam

3 years

#Fauci crashing lunch. He really needs to work on his landings.

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CalFalconCam

@CalFalconCam

3 years

"When did we get a second one!?!"

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CalFalconCam

@CalFalconCam

2 years

Peregrine Falcons, like many apex predators, adapt their hunting targets as prey populations shift. For example, during shorebird migration, they often go after sandpipers. There’s a very brief time each year around now that they almost exclusively hunt a very strange bird.

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CalFalconCam

@CalFalconCam

1 year

First chick has hatched!

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CalFalconCam

@CalFalconCam

1 year

Uh, Lou, you gotta wait a few more weeks for that step…

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CalFalconCam

@CalFalconCam

2 years

The sibs are out exploring together!

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CalFalconCam

@CalFalconCam

2 years

Happy Mother's Day, Annie!

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CalFalconCam

@CalFalconCam

1 year

Lou trying to figure out how he's supposed to sit on these squirmy fluffballs

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CalFalconCam

@CalFalconCam

2 months

You're a good dad, Archie!

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CalFalconCam

@CalFalconCam

15 days

Your daily prescription of two minutes of squirming fluff is here! All four chicks are looking great. They are getting frequent meals and are growing and developing well. It's already starting to get difficult to tell the younger one apart! Great job, Annie and Archie!

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CalFalconCam

@CalFalconCam

2 years

New Guy has to double check all the eggs are getting warm.

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CalFalconCam

@CalFalconCam

1 year

Annie chasing a Red-tailed Hawk out of her territory today. Amazing photo by Moon_Rabbit_Rising on Instagram. Give her a follow for more!

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CalFalconCam

@CalFalconCam

1 year

One year ago today, we lost Grinnell. Grinnell helped raise 13 chicks over five years. He was a devoted partner to Annie and a constant presence at the Campanile starting in 2016 (often staring directly into the camera). We miss you, Grinnell!

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CalFalconCam

@CalFalconCam

3 years

Hey you, get back in here!

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CalFalconCam

@CalFalconCam

2 years

Alden checking if he can take over incubation for Annie. Annie lets him know she's not going anywhere.

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CalFalconCam

@CalFalconCam

3 years

We have a pip! One chick has made the first tiny crack in the egg and is breathing outside air.

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CalFalconCam

@CalFalconCam

2 years

Some gorgeous shots of Lindsay exploring the library roof. Huge thank you to Moon_rabbit_rising for the photos:

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CalFalconCam

@CalFalconCam

2 years

Alden's attempt at feeding the chicks an entire Phalarope is interrupted by Annie.

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CalFalconCam

@CalFalconCam

3 years

What a difference a day makes!

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CalFalconCam

@CalFalconCam

2 years

🚨🚨Lindsay 🍞 Alert!!!🚨🚨

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CalFalconCam

@CalFalconCam

2 years

Dear @UCBerkeley , Would it be possible to air condition the Campanile? Sincerely, Two melty chicks

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CalFalconCam

@CalFalconCam

2 months

What's that you've got there, Annie? Egg 3 has arrived!

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CalFalconCam

@CalFalconCam

2 years

Hatch alert! Chick is at least partially out of the egg as we speak!

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CalFalconCam

@CalFalconCam

2 years

If you're a busy person who wants to watch a falcon nap for a half an hour but can't devote a half an hour to watching a falcon nap, this video is for you!

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CalFalconCam

@CalFalconCam

1 year

We had another drone flying incredibly close to the Campanile about an hour ago. To all drone operators: please do not fly near the Campanile. Flying drones on campus is prohibited. Harassing wildlife can lead to nest abandonment, injury, and death. Please stop.

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CalFalconCam

@CalFalconCam

12 days

For the first time at this nest site, we've seen co-feeding, with Annie and Archie sharing feeding duties! Full length video of this meal can be found here:

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CalFalconCam

@CalFalconCam

4 years

"I think things are getting a little out of hand, Annie!" Happy #April1st !

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CalFalconCam

@CalFalconCam

1 year

The youngest chick is testing out some revolutionary new acrobatic techniques for getting food. They still need a bit of practice... So far, everyone is growing very well and look very healthy. All of them are eating well, which is very nice to see at this age.

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CalFalconCam

@CalFalconCam

2 years

Big sister and little brother.

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CalFalconCam

@CalFalconCam

1 year

Annie (top in all pics) defending the nest site against an intruding female. Lou helped out, too (he’s the small one in the pic of 3) Incredible photos from

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CalFalconCam

@CalFalconCam

1 year

🚨🚨🚨🥚 #1 !!! 🚨🚨🚨 Annie was quite a bit earlier this year than she ever has been. The earliest previous egg was laid on March 10th!

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CalFalconCam

@CalFalconCam

2 years

The past three years, we have celebrated Father's Day with this silly little photoshop of Grinnell. Father's day typically has fallen at a time in the breeding season where everything was winding down a little bit, the chicks were all flying and learning to hunt on their own.

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CalFalconCam

@CalFalconCam

2 years

Annie and Grinnell performing a head bow display today. This courtship behavior helps strengthen the pair bond and is one of the key courtship behaviors seen during the breeding season.

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CalFalconCam

@CalFalconCam

2 years

Sad news to share with you all: Lindsay was found dead today on the west edge of campus. Lindsay was last seen at the Campanile in the first week of August and it appears that she likely died not too long after those observations. p:

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CalFalconCam

@CalFalconCam

1 year

Luna just fledged-successfully landed at Bancroft Library! Congrats to all on successful first flights!

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CalFalconCam

@CalFalconCam

1 year

Annie inspecting Lou's hard work keeping the eggs dry this morning. Good job, Lou!

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CalFalconCam

@CalFalconCam

19 days

At least one chick is celebrating Earth Day with a Birthday! Annie and Archie's first chick just hatched a few minutes ago. A second egg has a very substantial pip, so seems to be making good progress.

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CalFalconCam

@CalFalconCam

2 years

🚨🚨🍞Loaf Alert!🍞🚨🚨

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CalFalconCam

@CalFalconCam

2 years

So today, we celebrate Alden and Grinnell, the two falcon dads who made this breeding season possible! Happy Father's Day, Alden and Grinnell! We hope you're grilling up some nice pigeon wings for the family today, Alden.

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CalFalconCam

@CalFalconCam

3 years

We have three eggs! Annie laid at 11:47 last night. Here's Grinnell working on fitting another egg under him this morning.

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CalFalconCam

@CalFalconCam

2 years

Lindsay's really grown up since banding day, but she's still sitting the same way... Banding day photo by Dr. Zeka Glucs, @SCPBRG

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CalFalconCam

@CalFalconCam

20 days

Archie gives some quiet encouragement to his chicks. If you look close, you can see one of the chicks moving inside the pip.

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CalFalconCam

@CalFalconCam

8 months

Very exciting news out of Vallejo, CA - Zephyr had been resighted! This marks only the third Cal Falcon chick resighted. Huge thank you to Carissa Bamford for the photo and report!

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CalFalconCam

@CalFalconCam

1 year

As Annie’s 7th brood hatches on the Campanile, her grandchicks are hatching on Alcatraz! Larry (Cal Falcons class of ‘18) has just hatched four chicks at her nest. This will be her third brood on the island.

Golden Gate National Recreation Area - Alerts

@GGNRANPSAlerts

1 year

Despite last month's stormy weather on @AlcatrazIsland , four peregrine falcon chicks have just hatched after a month-long incubation period. That's the biggest brood in the island's recorded history! Read:

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CalFalconCam

@CalFalconCam

2 years

Annie and Grinnell ring in 2022 with a courtship display on the Campanile balcony. We have not seen the new male in a couple of weeks, so right now it seems like Grinnell has retained the territory.

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CalFalconCam

@CalFalconCam

2 years

I am the wind! I am the essence of speed! I am power incarnate! - Grinnell Jr.

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CalFalconCam

@CalFalconCam

2 years

Pip Pip Hooray! We have our first pip sighting as the chicks are starting to hatch. The pip is the first hole in the egg made by the chick, allowing it to breath outside air for the first time. From pipping to fully hatching takes ~24 hours.

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CalFalconCam

@CalFalconCam

2 years

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CalFalconCam

@CalFalconCam

3 years

In a scene that may bring back traumatic flashbacks for parents everywhere, Annie was hit by friendly fire while trying to innocently do bird yoga today. Culprit still at large and should be considered winged and dangerous.

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CalFalconCam

@CalFalconCam

1 year

The chicks are getting huge! Lou and Annie have been stuffing them full all day. Mark your calendars for May 5th. We will be banding the chicks early that morning and kicking off our annual chick naming contest later that day!

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CalFalconCam

@CalFalconCam

4 years

The chicks falling asleep after breakfast this morning.

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CalFalconCam

@CalFalconCam

29 days

Archie, I hate to tell you this, but if you're going to have trouble getting four eggs under you, you're going to have a heck of a time in a couple of weeks when you've got a squirming pile of fluff to deal with!

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CalFalconCam

@CalFalconCam

17 days

Family portrait! If you can't make it to our Hatch Day celebration, but still have burning Peregrine Falcon questions (or just want to tell us how cute those babies are...), we are just about 2 hours away from our live Q&A on YouTube!

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CalFalconCam

@CalFalconCam

2 years

Given the timing of this within the breeding season, it is doubtful that this nest will succeed with Annie alone. Over the next few days we will write a more complete remembrance. As you can imagine, like all of you, we are in the process of digesting this difficult news.

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CalFalconCam

@CalFalconCam

2 years

Alden never stops hunting. Although he should maybe learn when something is too small for the chicks.

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CalFalconCam

@CalFalconCam

1 year

New Guy successfully delivers a snack to Annie.

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CalFalconCam

@CalFalconCam

1 year

We wanted to send a huge thank you to @BAMPFA for hosting our hatch day party yesterday! It was so fun to see such an amazing turnout. Hopefully we will see one or both of the remaining eggs hatch in the coming hours, but for now we hope you're all enjoying these two fluff piles

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CalFalconCam

@CalFalconCam

2 years

Alrighty, so that was fast... Grinnell Jr. hopped out the window, immediately flew in a quick loop and landed back on the nest level. He then flew again a minute later and is now in a tree. Both chicks have passed the first major test and had successful first flights!

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CalFalconCam

@CalFalconCam

2 months

And then there were two! 2nd egg laid around 3:35am, a little ahead of schedule!

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CalFalconCam

@CalFalconCam

1 year

Alright, all three chicks are out and about - let's break down what's going to happen next. Although the chicks have passed one of their most dangerous moments (first flight), they still have a lot of work ahead of them. The first year of a Peregrine's life is very dangerous

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CalFalconCam

@CalFalconCam

2 months

Archie got an unexpected visitor on the tower! Recent research actually shows that Hummingbirds prefer to nest NEAR raptor nests! Hummingbirds are too small to be much of a target for raptors and raptors chase away crows, jays, squirrels, and other threats to hummingbird nests.

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CalFalconCam

@CalFalconCam

1 year

Lou got a chance to incubate the chick for the first time.

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CalFalconCam

@CalFalconCam

2 years

Dude, you're never going to impress her with food on your face...

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CalFalconCam

@CalFalconCam

2 years

After 9,478 votes, we are excited to announce the winning name for New Guy: Alden! Alden Miller, his namesake, (pictured here - sort of - with his collection of birds) was a student of Grinnell and succeeded him as director of the Museum of Vertebrate Zoology.

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CalFalconCam

@CalFalconCam

2 years

Grinnell Jr. really working out those wing muscles this evening. Crazy to think he'll be flying in just about a week!

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CalFalconCam

@CalFalconCam

2 years

Soon. Photo by

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CalFalconCam

@CalFalconCam

2 years

Fledgewatch just arrived on scene and found Lindsay happily perched on top of the Library. Congrats on the successful early morning first flight, Lindsay!

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CalFalconCam

@CalFalconCam

2 years

2nd chick is mostly hatched.

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CalFalconCam

@CalFalconCam

2 years

🚨🚨🚨🍞Loaf Alert!!!🍞🚨🚨🚨

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CalFalconCam

@CalFalconCam

1 year

Some of the really awesome acrobatics we've been seeing over campus. Part of flight school is a game called "talon tag", where chicks will try to "catch" their siblings or parents mid-air. Huge thank you to moon_rabbit_rising for documenting:

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CalFalconCam

@CalFalconCam

1 year

Peregrine Falcons, like many raptors have strong sexual dimorphism - females are bigger than males. Although the chicks are still growing a lot, their legs reach adult size fast, so we use that to id sex. Can't guarantee anything, but the right chick sure has massive talons!

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CalFalconCam

@CalFalconCam

4 years

A very unexpected flurry of excitement today. Grinnell was hanging out on the Campanile when a different Peregrine showed up! She was a juvenile female and unbanded, so we don't know where she came from. She was probably checking out potential territories and saw the Campanile

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CalFalconCam

@CalFalconCam

2 years

🚨🚨🚨The 🍞-master himself is in the house!🚨🚨🚨

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CalFalconCam

@CalFalconCam

1 year

With 3,693 ballots cast, we have our winners! Zephyr, named after the west wind (yellow band), Rosa, named after Rosa Scrivner, first woman to graduate from Cal (red band), and Luna, named after the moon (blue band).

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CalFalconCam

@CalFalconCam

2 years

Lindsay napping on the tower today.

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CalFalconCam

@CalFalconCam

2 years

"Hello? Is anyone there?" - Grinnell Jr.

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CalFalconCam

@CalFalconCam

2 years

Flap flap flap flap flap!

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CalFalconCam

@CalFalconCam

2 years

📢:🚨🚨🍞🍞🍞🍞🍞🚨🚨 Five-alarm loaf alert!

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CalFalconCam

@CalFalconCam

2 months

A nice compilation of Archie enfluffeling (a totally real and not made up scientific term) the eggs this morning. Good job, dad!

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CalFalconCam

@CalFalconCam

1 year

Hatching is happening like riiiiight now. EVERYONE, GET IN HERE!

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CalFalconCam

@CalFalconCam

17 days

And then there were 4!

UC Berkeley’s Annie the falcon sets a record: All of her eggs hatch on the Campanile

A popular community Hatch Day event today at BAMPFA celebrates four new chicks.

news.berkeley.edu

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CalFalconCam

@CalFalconCam

18 days

And then there were 3! We're very excited to see you all tomorrow for our hatch party at the giant outdoor screen at @bampfa ! 9 AM–5 PM | Falcon experts share insights and answer all your questions 11 AM–2 PM | Native Bird Connections on site with a live raptor! (cont.)

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CalFalconCam

@CalFalconCam

1 year

Sometimes it takes a little bit of work for Lou to convince Annie it's his turn to sit on the eggs. Especially if it's wet out!

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CalFalconCam

@CalFalconCam

2 years

From the amazing instagram feed of moon_rabbit_rising Annie and New Guy

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CalFalconCam

@CalFalconCam

1 year

Cuddly kind of day. The chicks are now reaching the age where they are more and more able to thermoregulate on their own. So, expect to see them uncovered more and more! They will also start to eat fewer, but larger meals around now

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CalFalconCam

@CalFalconCam

2 years

Short clip of the 2nd chick poking its beak out of the egg (keep an eye on the left egg). Hopefully next time Annie moves, we'll get a sense of how far along it is in the process!

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CalFalconCam

@CalFalconCam

1 year

Lou trying to get a breakfast tutorial from Annie this morning.

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CalFalconCam

@CalFalconCam

1 year

Breakfast Time is live right now!

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