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African raptor help needed please

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Old Friday 10th April 2020, 06:21   #1
talbotbrooks
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African raptor help needed please

Greetings!

I spied this raptor perched in a tree along the banks of the Letaba River 1km north of the Letaba Rest Camp in Kruger National Park on 11 March 2020 at approximately 18:30. The extension of the yellow on its bill back to the eyes, short tail feathers, and lack of feathers further down its legs is throwing me - otherwise I'd think it was a lesser spotted eagle - it's about the same size.
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Old Friday 10th April 2020, 06:26   #2
Valéry Schollaert
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Young Bateleur.
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Old Friday 10th April 2020, 10:40   #3
Andy Hurley
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Young Bateleur.
Agreed, a sub-adult
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Old Friday 10th April 2020, 12:00   #4
Valéry Schollaert
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Agreed, a sub-adult
Much young that sub-adult IMO, I'd call it juvenile, may be 2cy. It takes 7 years to be adult.
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Old Saturday 11th April 2020, 07:18   #5
Andy Hurley
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Originally Posted by Valéry Schollaert View Post
Much young that sub-adult IMO, I'd call it juvenile, may be 2cy. It takes 7 years to be adult.
It has the pale wing panel and yellow bill

Such a bird is depicted as sub-adult in the SASOL

Strange, as sexual diamorphism starts in the 4th year
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Old Saturday 11th April 2020, 12:20   #6
Valéry Schollaert
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It has the pale wing panel and yellow bill

Such a bird is depicted as sub-adult in the SASOL

Strange, as sexual diamorphism starts in the 4th year
Yes, this is a 4cy+ bird, male, but still probably too young to be called sub-adult.
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Old Thursday 16th April 2020, 06:15   #7
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Originally Posted by Valéry Schollaert View Post
Yes, this is a 4cy+ bird, male, but still probably too young to be called sub-adult.
Thanks Valéry. So sub-adult is the final year before adulthood?
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Old Thursday 16th April 2020, 07:07   #8
Valéry Schollaert
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Thanks Valéry. So sub-adult is the final year before adulthood?
This is how I understand it : "almost adult", adult type with a few remaining feathers or bare part colour as immature. I guess we might probably find different definitions in different references though.
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Old Thursday 16th April 2020, 15:53   #9
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This is how I understand it : "almost adult", adult type with a few remaining feathers or bare part colour as immature. I guess we might probably find different definitions in different references though.
Yes probably. They all have their own definitions. It shows their importance

Thanks again Valéry
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Old Friday 17th April 2020, 01:44   #10
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And there are those who feel that juvenile should be reserved for the very first set of feathers a bird has and that with the next set the bird is already in adult plumage or is an immature.

Niels
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Old Friday 17th April 2020, 12:28   #11
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And there are those who feel that juvenile should be reserved for the very first set of feathers a bird has and that with the next set the bird is already in adult plumage or is an immature.

Niels
Yes, juvenile is usually very clear, it is the very first plumage, before the first moult. In raptors, it can be confusing because the moult can last months or even years. Is it juvenile until the first feather felt down or until the first plumage is totally moulted ? That's the usual point of disagreement about juveniles.

I usually consider juveniles to the start of the moult only, then call moulting ones as being "in post-juvenile moult"
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