It took me a few minutes to comprehend what I was looking at. For several weeks now the osplets on the Port Lincoln Barge nest have been looking more like dinosaurs than fish eagles. But, this morning with the rain, their plumage looked much different. There was a strange white over the water so my first response was – the camera has a problem. Then the water was blue and the chicks were having their meal and well——.
Here they are lined up for the 12:36:06 delivery. Gosh, they had to have been hungry despite all those feedings yesterday. The weather must have hampered Dad’s fishing.
Still, there was no fighting. The chicks are all lined up as normal with Tiny Little right up at Mum’s beak! Oh, this kid really does love its fish.
So let us remember what we know about osplets plumage. When they hatch, they are covered with a very light greyish coat of down. You can see this in the image below.
It is 21 September. That was 22 days ago. Little Bob is 5 days old; the other two are 7 days old. Note the prominent dark eye line and the light soft down. Gosh they were so little! The hatchlings will keep this light coat of down from hatch until they are 10-12 days old, according to Alan Poole.
Oh, just look at Little Bob. So cute with that great big crop. He is the one closest to the viewer.
It is 5 days later. A darker charcoal coloured woolier down replaces that soft light grey down.
This is a huge period of change in terms of plumage. As the dark wooly down comes so do the feathers. The feathers show up first on the head and back and then on the body, later on the wings and tail. The feathers on the head and neck are a coppery-gold colour. This phase is called the Reptilian phase because they look more like their ancestors of 65 million years ago than the juvenile ospreys they are becoming.
You can see those coppery-gold feathers in the image below. The osplets are also growing at a fantastic rate.
The image below of Little Bob was taken three days ago. He was definitely in the Clown Foot stage! You can also see the dark grey wooly down as well as a few of the copper feathers on the back of his neck.
The image below was taken yesterday. You can see that the juvenile plumage is really starting to come in. It appears as little round tufts growing out of the blood quills.
In the image below, Little Bob is eating the prize fish tail. He is in his usual spot near the beak of Mum!
The image below was taken just a few minutes ago. I realize that feathers, like hair and paint, can appear darker when wet so use your imagination. It is as if a huge amount of juvenile plumage came in since last evening. Those feathers are really pushing out of those quills!
That is Little Bob at the very back. He is facing to the left and looking down slightly. He still has that spot and the white on the cere with the white swipe under his eye. Right now I can still find him but I might not be able to tomorrow.
In a blink. We will begin to notice considerable changes in their size along with the continued growth of feathers. The very last feathers to emerge will be the primaries and secondaries also known as the flight feathers. Only when all of their feathers have emerged from the blood quills will the osplets be ready to fly. We will know that when they really begin to exercise those wings and attempt hovering.
To give you an idea of the ‘look’ of the plumage and the size of the feathers I have included an image of Tiny Little, the third hatch of the Foulshaw Moss Osprey nest in Cumbria. This was taken on 24 August just before she migrated. Blue 463. Look at the length of her tail and the beautiful symmetry of her feathers. This is how the trio on the Port Lincoln nest will look by the time they are 50-60 days old.
As a reminder, Little Bob hatched on 16 September so he is now 26 days old. They have a long way to go but their plumage and their size are going to change right before our eyes. We really do not need to get our glasses adjusted! It is them, not us.
I couldn’t wait to show you those miraculous changes in the plumage of the three. It really is miraculous. Thank you so much for joining me. I hope to see you soon. Take care.
Thank you to the Port Lincoln Osprey Project and the Cumbria Wildlife Trust Foulshaw Moss Osprey Nest for their streaming cams where I took my screen shots.
Thanks Mary Ann for this great newsletter! They little PLO’s are really growing and feather changing indeed!
Thanks for the photo memory of Tiny Little , such a beauty indeed!
Look forward to the new updates and
Have a great day!