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rostral issue on Brown Shrike? KL, Malaysia

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Old Friday 8th February 2019, 13:17   #1
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rostral issue on Brown Shrike? KL, Malaysia

Kuala Lumpur, Malaysia, couple days ago.

I've seen this individual around, and decided to attempt a substantial closeup to no avail (trying to take photos with a lousy d3400 sensor is like eating rice with chopsticks); however, I noticed the unusual overlapping tomia. Doesn't normal like it but I don't think I'm experienced enough to say anything... So what's this?
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Old Friday 8th February 2019, 13:20   #2
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Perhaps a keratin disorder? Or just an overgrown beak in need of trimming?[

Last edited by AntarcticanShrike : Friday 8th February 2019 at 13:33.
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Old Friday 8th February 2019, 13:23   #3
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Originally Posted by AntarcticanShrike View Post
Kuala Lumpur, Malaysia, couple days ago.

I've seen this individual around, and decided to attempt a substantial closeup to no avail (trying to take photos with a lousy d3400 sensor is like eating rice with chopsticks); however, I noticed the unusual overlapping tomia. Doesn't normal like it but I don't think I'm experienced enough to say anything... So what's this?
CORRECTION: From other pictures, it seems the tomium of the mandibular rostrum is penetrating through the tomium of the maxillary rostrum?

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Old Friday 8th February 2019, 17:24   #4
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A common deformity across many species.
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Old Friday 8th February 2019, 19:27   #5
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Hi, have you mirrored/inverted any of the 2 photos in the OP post? Or are they actually showing the left and right sides of the head respectively?
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Old Saturday 9th February 2019, 00:21   #6
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Presumably something like this in a group of finches led to the evolution of crossbills - the mutation not always harmful.
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Old Saturday 9th February 2019, 00:29   #7
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My question above comes from the fact the bill looks perfectly normal, no mandibles crossed whatsoever to my eyes (both sides in view). It looks to me like a thin bit of debris is stuck to the culmen in a funny way (perhaps dried meat from an earlier meal? or a bit of an insect gut? remember these birds are the butchers of the passerine world, so their bills do get messy). I really can't see this as the lower mandible piercing the upper, as there would be further evidences of such a traumatic event around the place the "thingy" is sticking out.
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Old Sunday 10th February 2019, 01:21   #8
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Quote:
Originally Posted by RafaelMatias View Post
Hi, have you mirrored/inverted any of the 2 photos in the OP post? Or are they actually showing the left and right sides of the head respectively?
Different pictures... Different angles... I have legs
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Old Sunday 10th February 2019, 01:22   #9
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Originally Posted by RafaelMatias View Post
My question above comes from the fact the bill looks perfectly normal, no mandibles crossed whatsoever to my eyes (both sides in view). It looks to me like a thin bit of debris is stuck to the culmen in a funny way (perhaps dried meat from an earlier meal? or a bit of an insect gut? remember these birds are the butchers of the passerine world, so their bills do get messy). I really can't see this as the lower mandible piercing the upper, as there would be further evidences of such a traumatic event around the place the "thingy" is sticking out.
No. The mandibular rostrum is penetrating the maxillary rostrum.
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Old Sunday 10th February 2019, 01:23   #10
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Originally Posted by andyadcock View Post
A common deformity across many species.
Interesting.
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Old Sunday 10th February 2019, 01:32   #11
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Quote:
Originally Posted by AntarcticanShrike View Post
No. The mandibular rostrum is penetrating the maxillary rostrum.
But there's no visible evidence of that. I'd call it a self-suggestion. The culmen shape is perfectly rounded, and showing a perfectly normal shape, with no visible sign of trauma whatsoever.
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