World Osprey Week is from 22-26 and it celebrates the arrival of the Ospreys from their winter migration in Africa back to the United Kingdom in spring. For the second year, the pandemic has caused previous large celebrations to be much scaled down. Still, it does not damper the enthusiasm of Osprey lovers throughout Wales, England, and Scotland as they welcome home these beautiful yellow eyed sea hawks.
There is even an app and a website where you can go for sightings and confirmed arrivals on nests. This is very impressive.
And there are educational programmes and YouTube videos all week. Here is Day 1:
There are also free digital educational packets which you can order on line. Simply go to this URL and sign up: www.lrwt.org.uk/wow
Now let’s check and see which of the Ospreys at monitored nests have arrived so far.
The very first Osprey to arrive was Blue 25 (10), a female. She is back on one of the Rutland’s nests. Blue 25 (10) was born in Rutland in 2010 – hence, the (10) in brackets behind the tag colour and number.
The stars of the Mantou Nest are Maya and Blue 33 (11). They arrived within thirty-minutes of one another. Great planning! Blue 33 (11) flew in at 12:29 followed by Maya at 12:56. These two have been together and raising chicks since 2015. And they wasted no time in getting reacquainted. The streaming cam caught them mating at 1pm! After fighting over a fish that Maya caught, Blue 33 decided some nestorations were in order.
After bonding it was time to eat and you can see that everyone wants the fish that Maya caught! Too funny.
All is calm again and it is time to start getting the nest in order. Don’t you think Blue 33 (11) is handsome?
And both arrived back on the nest right before dawn on the 22nd of March to start things off:
Laddie (LM12) arrived home at 5pm, 21 March, at the Loch of the Lowes Reserve nest. He is the resident male at this nest. There is a new female as of last March tagged NCO. She was ringed as a chick at Loch Ness in 2016. His former mate was LF15. She went missing on the 7 August 2018.
Lock Arkaig is awaiting the arrival of Louis and Alia.
The nest at Glaswyn is awaiting for the arrival of Mrs G (the oldest Osprey in Wales) and Aran.
The Cumbria Wildlife Trust is waiting for arrivals to their Foulshaw Moss Osprey Nest . 2021 will be the eighth year running – should the mated pair arrive – that Osprey chicks have been born on this nest. The couple are Blue 35 (female) and White YW (male). This mated couple have fledged sixteen chicks between 2014-2020. At least one of their fledglings, Blue 5N, of 2018 has been spotted in The Gambia in 2019.
So everyone is waiting! Some people are trying to keep six screens open at one time in case someone arrives today. Enjoy the beginning of World Osprey Week! Find a nest and enjoy all the fun of the arrivals.
And before I close this off. Just a note. The Achieva Osprey nest fooled me again. All three had full crops this morning at 9:33 CDT. Wow. So happy. Let’s hope Jack continues to bring in very large fish. It helps.
Thank you to Achieva Credit Union, the Leicestershire and Rutland Wildlife Trust, Friends of Loch Arkaig FB, Cumbria Wildlife Trust, Scottish Wildlife Trust for their streaming cams where I got my scaps.
The University of California Campus at Berkeley is ‘falcon crazy.’ They even named their basketball team the Falcons. Indeed, the feathered pair nesting on top of this beautiful building are ‘stars’. Everyone knows about them and gets excited – how grand is that?!
The Campanile was designed in the Gothic Revival style and was completed in 1914. The tower, reminiscent of the Campanile di San Marco in Venice, is ninety-four metres or 308 feet hight and has four bells. It is the most recognized building on the University campus.
This is the view from the roof:
In 2016, a pair of Peregrine Falcons began to roost on the roof of the Campanile. Their scrape box is two floors up from the bells and to everyone’s amazement the bell concerts do not seem to bother the raptors. If it did, we can imagine that they would have left quickly. Most of the time it is a safe place to raise their young but they have had, like other nests, intruders checking out their prime real estate.
In 2017, the same pair returned to raise eyases. They were given the names Annie and Grinnell in honour of the founder and first director of UC Berkeley’s Museum of Vertebrate Zoology, Annie Grinnell. Annie is not banded and her history including how old she is remains unknown. However, Grinnell was banded in 2013 as a nestling near Martinez, California. All of their chicks are banded in the nest.
If you have read most of my blogs you will know that I am a great proponent of banding. The amount of information that can be discovered is significant. And for Birders on the Ground it is an opportunity to take part. It takes a village to chase after falcons and check their bands, photograph them, and then find the right person to contact to tell them of the sighting.
If you have never seen a nestling banded, here is your opportunity. This is a short video of Poppy, Sequoia, and Redwood being banded in the scrape box in 2020 along with a Q&A:
Annie and Grinnell made their first nest on a sand bag on the roof of the Campanile in March of 2017. Poor things! But they had nothing else. In the wild, Peregrine falcons make their nests on a the edges of cliffs with a sandy base or in gravel.
In the image below, Grinnell is incubating the eggs in the permanent scrape box. Notice that it is a simple enclosure, with a single opening at the front. Wooden rulers have been fixed to the frame of the door and the corners so researchers can check the height of the young. Simple pea gravel or small river stones line the bottom. This is the ‘nest’. No other materials will be brought in. The falcons will rub their breast into the gravel to make a hollow for the eggs.
When two of the eggs of Annie and Grinnell’s first clutch rolled off the sandbox and broke, the University decided to install a temporary scrape box. Annie and Grinnell accepted the box and fledged their first babies – two eyases- from the Campanile. They were a male named Fiat and a female named Lux. The names were derived from the University motto, Fiat lux, which means bringing knowledge to light. Fiat survived but Lux was killed by window strike.
The following year the University installed a permanent nest box for the pair hoping that they would return and lay their eggs again. In April of 2018, Annie and Grinnell had three eggs hatch. Named after three elements discovered at Berkeley the chicks were a male named Berkelium, another male named Californium, and a female named Lawrencium. All three fledged. Lawrencium is the only one of Annie and Grinnell’s chicks that has been spotted. She is nesting on the island of Alcatraz.
In 2019, the exploits of Annie and Grinnell were streamed to the world. That year two chicks hatched and were successful fledges. One was named Carson after Rachel Carson. Hers is a name that you should know. Carson is the author of the book Silent Spring that led to the banning of DDT. Cade was named after Tom Cade, an Ornithologist recognized for his efforts to both protect and reestablish Peregrine Falcon populations after they were wiped out by DDT. Cade was the founder of the Peregrine Fund. He died in 2019 at the age of 91.
In 2020, Annie and Grinnell fledged three – a female named Poppy, a male named Sequoia, and another male named Redwood.
It’s 2021 and Annie and Grinnell are incubating four eggs! The first was laid on 10 March, followed by the second on 12 March, the third on the 14th and the final egg on St. Patrick’s Day.
In the image below, Grinnell has arrived to partially incubate the first three eggs. The eggs can actually range from a cream colour to red but here you see that Annie has laid three lovely red eggs.
While it is known that falcons sometimes lay five eggs, it is rare. And this brings me to why I love falcons so much and it isn’t just their very ‘cute’ plumage. It is because of delayed incubation. Annie and Grinnell can hatch four eyases but I am not up worrying all night when one didn’t get fed or the eldest was aggressive – it would be rare for that to happen but I am aware that it does.
The embryos inside eggs only develop when they are warm. Peregrine falcons, Red Tail Hawks and other raptor species (other than Ospreys and various species of eagles) want their eggs to hatch at roughly the same time. That way there is not a significant difference in development. To achieve this synchronization, the early eggs are only partially incubated until all are laid. Then hard incubation begins. Annie and Grinnell will take turns incubating the eggs. After hard incubation starts the eggs will hatch in roughly 32-33 days after the last egg was laid. The eyases use their ‘egg tooth’ to help them get through the thick shell which can take from 24-48 hours. Pip watch should start about 19 April! I am so excited!
UPDATES: Speaking of pip watch, Jackie and Shadow can hear one of their little ones chirping in the shell. Big Bear Eagle fans are on hatch alert!
Maya and Blue 33 have both arrived at the Mantou Bay Nest at Rutland in the UK on 19 March. Blue 33 (11) came in at 12:29 and Maya was right behind him at 12:56.
So far it appears that Blue 25 (10) is still waiting for her mate at Rutland.
The three on the Achieva Osprey Nest in St Petersburg, Florida have now been fed to the relief of everyone. The storm caused Jack to bring in only a small fish last evening. Brutus, the eldest, was very aggressive towards the smaller two and they went to sleep without any fish. (Brutus is the name given to the eldest by the chat group). First fish this morning was also small and caused aggressive behaviour. However, Jack went and brought in a nice sized second fish right away and everyone ate and were congenial.
Both were fed at the Duke Farms Bald Eagle Nest in Hillsborough, New Jersey so all is well on that nest.
Solly, the Port Lincoln Osprey, is 181 days old today. She spent the night at the Streaky Bay Hospital and has been out and about looking for fish. She loves this area. I hope it keeps her safe and is her forever home.
It’s nearly 4pm on a beautiful sunny day on the Canadian prairies. Let’s hope it stays that way so that everyone can get out for a walk and check on the local wildlife in their area.
Thanks to UC Berkeley Falcons, Duke Farms, Achieva Credit Union in St Petersburg, Big Bear for their steaming cams and Rutland Wildlife where I took my scaps and to Port Lincoln Ospreys and the PLO researchers for the satellite tracking for Solly.