There was a hatch on the Savannah Osprey nest on 13 April. The pip happened at 20:58:42 the night before. There is the cutie looking for some fish!
NC0 laid her second egg on the Loch of the Lowes nest today, 14 April. The first was laid on the 10th. What a gorgeous view! NC0 was apparently very quiet and took everyone by surprise.
In the changing of shifts, you can see the two beautiful reddish eggs. The couple had one chick last year – will they try for three in 2021?
Louis is still waiting for Aila to arrive at the Loch Arkaig nest.
Telyn or Blue 3J was busy rolling her egg over at the Dyfi Nest in the middle of the night. Might we expect a second egg eminently? The first was laid at 9:55 am on 12 April! Some are not leaving the streaming cam as Telyn is breathing rather heavy in the middle of the night.
Telyn sure is a beauty! Did you know that she is the daughter of unringed Maya and Green 5R from Rutland? She was born in 2013. No wonder she is so gorgeous.
What a beautiful sunrise at Clywedog. No eggs for Dylan and Seren yet! Dylan was back on 24 March and Seren on 29 March. Fingers crossed as the middle of April approaches.
The second egg was laid at Foulshaw Moss on the 13th with the first coming on the 10th. The image below shows Blue 35 doing her incubation duties. She is the mate of White YW.
Maya is blissful incubating her three eggs at the Rutland Mantou Nest. Her mate is Blue 33 (11). The eggs were laid on 30 March, 2 and 5 of April.
Wonder what is happening on the nest of Mrs G and Aran? Will there be another egg? The first for this much loved pair at the Glaslyn Nest came on 10 April, the second on the 13th and we are expecting the third on the 16th!
As I was typing this, a fish came on to the Achieva Osprey Nest. Thank goodness. It has been incredibly hot there. There was speculation that something might have been wrong with one or the other of the parents. Was Jack’s leg hurt? Why wasn’t Diane fishing like she did yesterday? There was also worry that since the two older ones had not eaten they would be very aggressive. Tiny Tot grabbed that fish and wanted it but, as usual, he had to wait. Now the older sibs just weren’t that interested. Could it be that they ate so much yesterday they both need to cast a pellet and Tiny will get ‘fed up’. Diane fed him privately for 45 minutes. Bravo!
And last, some news from UC Berkeley’s Peregrine Falcon Nest. There is now communication with the eyasses and expected hatch is 17 April. Splendid! Annie and Grinnell are amazing parents and there is nothing short of delirium watching a peregrine falcon nest. And no worries about siblicide!
You can join in the peregrine excitement here:
Thank you so much for joining me today. Oh, I can’t wait for these furry little falcons to hatch. What a riot it is when they figure out how to eat. You will love it! And I am relieved, like so many, that Tiny Tot got fed today. Don’t care what time just that he was fed. If another fish doesn’t arrive, he is fine til tomorrow. Tiny Tot has taught us that.
Thank you to the following streaming cams where I get my screen shots: UC Berkeley Peregrine Falcons, Achieva Credit Union, Woodland Trust, Post Code Lottery, Friends of Loch Arkaig, Rutland Water, Scottish Wildlife, Friends of Loch of the Lowes, Cumbria Wildlife Trust, Montgomeryshire Wildlife Trust’s Dyfi Osprey Project, and CarnyxWild Wales.
Here is a great shot of Tiny Tot after that good feeding. Food coma will come shortly!
Birds have developmental ‘milestones’ just like humans. Right now there are so many Bald Eagle nests where eaglets are already two or four weeks old. In others, the parents are incubating eggs. And there are others where the parents are only beginning to start working on the nests. You can see every stage of a Bald Eagles growth from the female laying the egg to their fledging from the nest on the many streaming eagle cameras. Every eaglet is different, just like people and their development will not happen on a single specific date.
Within the overall umbrella of bird development, you might remember Daisy the Duck (see previous blogs for more information on this remarkable little duck). This Black Pacific Duck laid her eggs in the Sea Eagles nest. We knew that the ducklings would jump from the nest 24 hours after hatching if we actually got to hatch – which, sadly, we did not. Those ducklings could see, forage, swim, and take care of themselves without help from the parent. Daisy would, still, gather them up and protect them during the night. Fully independent of their mother, those ducklings would have been ‘precocial’. In contrast, the eaglets are not fully developed, nor are they able to feed themselves, or fly down from their nest. Indeed, they are covered with fluffy down but are unable to regulate their temperature.
It takes from ten to thirteen weeks for eaglets to fledge whereas the ducklings do this at twenty-four hours. Eagles as well as all other hawks or raptors are ‘semi-altricial’. This means that they will be dependent on their parents for everything they need until fledge. Even after fledging, the parents will teach them to hunt and will provide prey supplements for them.
Until the onset of streaming cams, there was very little quantitative information on the development of Bald Eagle Nestlings. Today, there are cameras, often more than one, on nests around the world. You can, at any time of the day, watch Bald Eagles, Peregrine Falcons, Golden Eagles etc. at your leisure. The growing community of citizen birders has impacted the knowledge of avian development and behaviour considerably. We are, indeed, continuing to learn every day. Advances in satellite transmitters means that birds can now be studied after leaving the nest providing much information about foraging, distance from natal nest to establishing their own territory, etc. This blog today is general and non-scientific in its terminology.
Many look at the development of Bald Eagles through three stages: structural growth, feather growth; and behavioural growth. Others attempt to combine feather growth with behaviour and structural development into weekly goals. In fact, I have pondered over this blog and how to approach it for several days because there are different factors that impact development. One of those is gender. There are also studies that have shown that the levels of salt in the diet impact growth while others have examined the amount and quality of prey. We know from studying Red Tail Hawks that if you double the amount of prey and the eyases remain in the nest for several days beyond the average, they are better equipped to fly and hunt. Their overall condition is much stronger. For the purposes of our discussion, I have used evidence from the NEFL Bald Eagle nest in 2021 and the SWFL Bald Eagle nest in 2021 and 2017 (E9). There is one eaglet on the NE nest and two on the SW nest in 2021. The parents on the NE Florida nest are Samson and Gabrielle. Samson was born on this nest on 23 December 2013. He is a little over seven years old. We do not know the age of Gabrielle. At the SW nest, Harriet is in her mid-twenties and M15 is 11 years old. Both nests are located within close proximity to a city – Fort Myers and St Augustine. The Fort Myers nest is unique in that the D Pritchett family has a working farm on the land where the nest is located. They also stock a pond in close proximity to the nest specifically for the eagles. This means that there is always food available. Still, the parents bring in road kill as well as fish from the pond. The NE nest does not have this advantage but nest observations reveal that there is an abundance of food although the variety might not be the same as the SW nest.
Both E17 and E18 were born on 23 January 2021. N24 was born on 8 February.
The first week of their lives, eaglets are covered with fuzzy down. The proper term is natal down. They can sit up but it is difficult to support their heads and focus. You can see the white dot indicating the egg tooth. This will disappear later. They use the egg tooth to break through the thick shell. This is often called the ‘bobble head’ phase. Their heads are big and they do not yet have the neck strength to keep them upright at all times. Their eyes are adjusting to focus. Sibling rivalry might already have started. As the days progress, the eaglets will get the strength to hold up their head and balance it. They will also be able to focus with their eyes so they do not look like they are using their beak like a dart but with a moving target (often their sibling). While the bobble head stage is very cute, it is often a relief when the eaglets are more stable.
By week two, the eaglets will be observed crawling out of the nest bowl. They are not walking. They are crawling. N24 is using its feet and wings to help it get out of the nest cup and up to the pantry. It is five days old! Food is a great motivator! Samson has the little one ‘working’ for its dinner. This helps to strengthen its wings and legs. In the Captiva Florida Eagle nest, Peace climbed out of the nest bowl towards the food on day 2. The inclines of both nests are different. The parents present the eaglets with challenges to help them develop their strength such as stretching their necks, grabbing and holding food, working their legs and wings. It’s like having your own personal trainer!
The beak will begin to grow and the little ones should begin shooting the ‘ps’ out of the nest bowl by the end of week one or beginning of week two.
The eaglets are more observant of their world. They will have doubled in size from the day they hatched and their eyes and beak continue to develop. You will begin to notice that pin feathers are growing in at their wing tips. They will start to stand keeping their balance with these wing tips.
More feathers begin to appear on the shoulders and the back and the wing feathers are getting longer as the days progress. They are starting to wing flap and they will try picking up food.
N24 is twelve days old in the picture above and the one below. In the one below, you can also see the pin feathers right at the tip of the wing starting to come in. N24 is also standing for several seconds, getting its balance, and flapping those wings.
During the third and fourth week, a pattern of accelerated feedings and growth begins. Head and chest are still showing signs of some fluffy down but more dark feathers are starting to emerge.
The eaglets are actively preening those feathers to help condition them as well as to help stop what some say is an itching as the feathers grow in. There is more wing flapping and the eaglets stand with confidence and stability. During this time you will see attempts at standing and walking. They begin to make some effort at self feeding. They are eating much more at each feeding often lunging at the parent to take the food out of their beak. Many observers say that their crops appear like they could burst! These big feedings often result in the eaglets sleeping immediately after a feeding. This is a ‘food coma’. The enlarged crops are extra storage spaces where food is held before being ‘dropped’ to the stomach. Sometimes people call this accelerated growth period the ‘clown feet’ era because the feet seem to grow way out of proportion to the rest of their body. They will also cast pellets. Pellets are food that is undigested such as fur and bones. Pellets are compressed into a hard shape and regurgitated. This often involves coughing and sometimes the eaglets appear not to want to eat the day the pellet is cast. This level of peak energy demands appears to begin to wane after about five to six weeks.
Beginning around week five to eight, the eaglets often sit with their wings drooping (getting heavy). Hopping and flapping wings occurs more often. They are very interested in what is happening outside the nest. By the end of this period, they will begin to have more of their juvenile plumage colouration. They will be able to hold food and tear bits. They will begin to mantle food. Mantling is the covering of food with the wings in order to have the prey item to themselves. They will stand for longer periods of time and are able to walk easily by the end of the period.
From week nine to fledging. The feathers will become more defined over their entire body and they will stand for longer periods of time upright. They can stand easily on one leg. The hopping, jumping, and flapping of wings accelerates. They are self-feeding but the parents will also continue to feed them. They will now spend their nights sleeping upright like their parents with their head tucked under their wing. They can easily perch on the edge or rim of the nest and will be branching, hopping up to a branch and back down into the nest. Branching tends to occur from seven to ten days before fledging, generally.
It is always exciting to see the eaglet hatch and sad when they fledge. Unless there is a transmitter or bands, they fledge and there whereabouts often goes unknown. Once they are wholly independent of their parents, the juveniles need to find their own territory and source of prey. Sadly, fifty percent of all first year eaglets perish while ninety percent of all year two eaglets tend to survive. The average age of maturity for Bald Eagles is five to six years although there is a young sub-adult male who is incubating his first eggs with his mate in Minnesota right now.
Thank you so much for joining me today. Stay safe. Be well.
Thank you to the Eagle streaming cams at NEFL and SWFL as well as the D Pritchett family. The scaps came from their streams.
It is nearly -40 now and will be in the -50s with the wind chill in parts of Canada for a few more days but, when I looked at the map the deep blue desperately cold area dips way, way south. It includes the Bald Eagle nests on the Mississippi River near Fulton, Illinois, the Bald Eagle Nest in New Jersey, and it will touch on the nest of my favourite Red Tail Hawk family in Ithaca, New York. Thankfully, Big Red has not laid any eggs yet. Six more weeks to go! There is barely a spot that is not going to be well below normal. Perhaps the eagle nests in Florida have escaped this. Oh, I feel so sorry for all of the birds and the animals and despite the fact that I know they are extremely smart, I still worry about them. And, also, of course all the people including the many homeless in all of our communities.
In the past couple of days we have talked and seen those eggs cracking and new little fluff balls appearing. Instead of talking about it again, I am going to post a short little video by Dr. Christian Sasse. He lives in British Columbia. You might know of his magnificent photographs of the Bald Eagles around Vancouver and Vancouver Island. Oh, you can tell just looking at them that he loves those raptors. He made a very short video of the last moments of hatching. It is something that most of us will not ever be close enough to see. I do hope you enjoy it!
You already know that the first little eaglet has burst out of its shell at the Northeast Florida nest of Samson and Gabrielle. That other egg was really split but by 5pm 8 February (Monday), the eaglet had not hatched. You can see the crack in the egg and the grey fluff of the little one in the aerie. Gabrielle is working on the nest. You will see them venting and airing the nest. The adults may bring in greenery to help minimize insect issues. Nothing like having some rotting fish in a nest open to the sun and it is 30 degrees C. Can you imagine what that smells like? Whew.
Gabby’s little one, whose fluffy head you can see next to the egg of its sib, is very strong. It is standing up and eating great big bites of fish.
Awwwwwww. Cuteness! I am so happy for Gabby and Samson. This is their second try this season. They, too, were the victim of a raven grab when Gabby needed to leave the nest and Samson wasn’t around. He is being super diligent this time!
The second egg is not showing any big changes to me. It is possible that it is not viable. There is a huge problem coming for the eagles. After 1970 when they were all but wiped out, there are now so many that there are not enough trees for them to nest in. That is the biggest reason we are seeing intruders in nests. I wonder if they will adapt to sharing like the Trio?
Are you familiar with the word ‘carion’. No, I am not talking about a video game or a wood wind quartet, carion as in ‘road kill’. I joked with you yesterday but, in fact, I guess it isn’t a joke. People who love raptors talk about dead animals. And that brings me to the picture below. That is M15, the father of E17 (the little terror) and E18 (the sweet cutie) of the Southwest Florida Eagle nest on the property of the Pritchett Family.
I recall, not that long ago, having a discussion with someone about prey. They told me in no uncertain terms that eagles only eat fish. Now, let’s think about that. Didn’t we just see a bunny on the SWFL nest? and a possum up at Gabby and Samson’s place? The White-Bellied Sea Eagles even brought in a fox cub so that they could have a family feast with 25 and 26! That fox cub was carion, road kill. Oh, and Dad even brought in a turtle last year. The sea eaglets had no idea what to do with it but Lady did. Must have been very tasty. She did not offer Dad a single bite. The live streaming cams are certainly changing what we know about all of the birds. Things that everyone believed are being tested. Remember Solly from yesterday’s posting? Remember she flew inland and was 200 kilometres away from her nest. She is breaking records and we are learning something every day. Just like we do on the eagle nests.
Today, M15 has found ‘something’. The image is too grainy and he was way too far away for the cam operator to focus. But he fought with ‘it’ for awhile. At one time I really thought it was another large dark bird. It is definitely too big to get up to the nest whole. Maybe tomorrow M15 or Harriet will be able to rip off a piece of it so that we can see what they have found. One year Harriet brought an Anhinga into the nest. They are large birds with long sharp beaks that stab fish underwater. They are sometimes called the devil bird. I don’t think that is what M15 has but, who knows?
Harriet caught a fish in the morning. Between her and the eaglets, it didn’t last long. Not a flake left! It was a really not day and that fish gave the little ones much needed hydration.
But look where E18 got himself. At first I just held my breath thinking he would get his leg caught and would not be able to get out. Or he was going to fall out of that nest. But this was a great move. 18 has the perfect location to be fed without any bother from 17. There is even a pokey stick between them.
I would just as soon they didn’t try to get up on the rim of the nest though. It is pretty nerve wrecking watching.
When Harriet finished, they both passed out in food comas. Keep them full and happy.
A great close up. Looks like their eyes are all healed without any relapses. Fantastic! And the egg tooth seems to be gone now.
Is it possible for a raptor’s talons to be cute?
Ah, and they are so sweet when they are sleeping. Best buddies. Makes my heart melt.
What a great way to close the blog today with this cuddle puddle!
Stay inside if you are in the area of the Polar Vortex. Call for help if you need it. Which reminds me. Keep your phone charged! I will check in on the nests in the area of the cold later today and give you a short update.
Thank you for dropping by. It is so wonderful to know there are so many people who love birds.
And thank you to the NEFL Eagle Cam and the SWFL Eagle Cam and D. Pritchett family for the streaming cameras where I took my scaps.