![MynaJ-tarsus deformity [KCTsang]](http://www.besgroup.org/wp-content/uploads/MynaJ-tarsus-deformity-KCTsang.jpg)
“Managed to get a picture of the tarsus of a Javan Myna (Acridotheres javanicus) this morning.
“I have noticed this deformity for some time. However it does not affect the bird’s every day function.
“Maybe some one out there could have an explanation for this growth?”
KC Tsang
Singapore
18th March 2017
This post is a cooperative effort between Birds, Insects N Creatures Of Asia and BESG to bring the study of birds and their behavior through photography and videography to a wider audience.
Amar-Singh HSS
Dear Tsang, at first glance (as a medical doctor) I was wondering if this was overgrowth due to a previous fracture. But the bone/limb look straight and not deformed so less likely. Possibly some disease with a growth.
Amar
K C Tsang
Thanks Dr Amar-Singh HSS, yes must be some thing that causes this unusual growth….
K C
Tammy Hartnett
Looks like Hyperkeratosis on the leg.
YC Wee
Thanks for the above Tammy. See http://www.starlingtalk.com/hyperkeratosis.htm
Lee Chiu San
Hyperkeratosis is very common in caged songbirds that have been fed a diet which is too dry and which lacks the correct nutrients.
Just visit any of the places where hobbyists bring their songbirds to socialise. You will notice this condition, especially among the older birds.
For convenience, many hobbyists do not give their birds sufficient insects and fruit in their diet, as these result in messy and watery stools.
On the incorrect diet, over a period of years, the birds will develop this condition.