pet care & health
Feathers aren’ t just for flight – they reveal a bird’ s health, mood, and personality. Learn how to spot stress, prevent feather damage, and keep your feathered friends happy, healthy, and thriving.
By Dr Dorianne Elliott, avian and exotic animal veterinarian at Valley Farm Animal Hospital
Think of a bird, and one of the first things that comes to mind is that most can fly and the reason they can do so is that they have specialised flight feathers. Feathers are unique to birds among all living animals on our planet. Strangely, some dinosaurs have been proven to have had feathers, and birds are actually closely related to them.
Functions of feathers
There are numerous benefits to having feathers. Birds use them for temperature regulation, for camouflage, for display( both to ward off rival males and to attract mates) and, of course, for flight.
Feathers come in multiple types, depending on their function. The body is covered with fluffy down feathers that trap air and help to minimise heat loss. Covering these are the contour feathers – those that keep the bird waterproof and provide colour and streamlining.
The wings and tail have long and strong flight feathers attached directly to the bone. They are aerodynamic, designed to give maximum lift with minimal effort. And lastly, specialised sensory filoplumes lie among the other feathers to allow the bird to sense the feather position.
Feathers as health indicators
When examining the feathers of our pet bird, there are multiple visible changes to their normal appearance that can indicate the health status of the bird and potentially give early warning signs of disease.
Feather mites can chew holes in the feathers, which are easily visible with backlighting. Horizontal see-through bars, especially on the flight feathers, are known as stress bars and indicate a period of stress or disease while that particular feather was growing.
Multiple colour changes can occur in feathers. For example, if a grey bird such as an African Grey parrot suddenly develops pink feathers on the body, this can indicate either damage to that feather follicle( perhaps from being repeatedly plucked out) or potentially, a problem with the bird’ s liver function. The sudden appearance of yellow feathers on a green bird may indicate similar problems.
Shiny green and blue feathers, such as those on the Amazon parrots and macaws, can develop black patches on
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