What Is Preening?
Preening is a bird's way of grooming its feathers to keep them in the best condition. While preening, birds remove dust, dirt, and parasites from their feathers and align each feather in the optimum position relative to adjacent feathers and body shape. Most birds will preen several times a day to keep themselves healthy.
The uropygial gland, or preen gland, is an essential part of preening. This gland is found near the base of the tail and produces an oily, waxy substance that helps waterproof feathers and keep them flexible. While preening, birds spread this oil to each feather so they are evenly coated and protected. Some types of birds, including owls, pigeons, parrots, and hawks, lack a uropygial gland. Instead, these birds have specialized feathers that disintegrate into powder down, which serves the same purpose as preen oil. Birds that produce powder down are less likely to bathe or immerse themselves in water and do not require the stronger waterproofing that preen oil provides.
Why Preening Is Essential
Preening serves several essential purposes for birds, including:
Moisturizing feathers with preen oil so they are flexible and strong, instead of brittle and easily breakable. This helps feathers better withstand the stress of flight.
Aligning feathers for optimum waterproofing and insulation to protect against adverse conditions, such as soaking or extreme hot or cold temperatures.
Aligning feathers into the most aerodynamic shape for easier, more efficient flight. This helps birds use less energy in flight and make more acrobatic moves.
Removing feather parasites and body lice that can destroy feathers or carry disease. This keeps birds healthier and protects the entire flock or nest from an outbreak.
Removing tough sheaths from newly molted feathers. Removing these sheaths helps gets feathers into the proper position more quickly so they can be useful right away.
Creating a healthier appearance to attract a mate. A healthier, more attractive bird will attract a stronger mate and have a better chance of raising many strong, healthy chicks.
Bonding between mates as a courtship ritual that involves mutual preening, called allopreening. This is a form of communication between mates and helps keep their connection strong.
With so many reasons to preen, it is no surprise that many birds engage in this behavior for several hours a day.
How Birds Preen
Birds use their bills and feet to preen each feather on their body, methodically nibbling or stroking every feather from its base to its tip to get it aligned just so. Birders are familiar with different contortions birds will use in order to reach every feather, and it is not unusual to see a bird in an unusual and odd position while preening. There are other behaviors, however, that are also a part of preening.
•Dust Bathing: Many birds, particularly game birds and sparrows, that will take dust baths as part of their regular preening. The dust helps dislodge parasites and absorbs excess preen oil so feathers are not too heavily coated. Birds that do not bathe in water are more likely to use dust baths frequently, but many birds will use both types of bathing.
•Sunning: Sunning helps birds control body parasites and feather mites by moving these pests around to different areas of the body where they can be nibbled away. Sunning can also make the oil from the preen glad more liquid and easier to spread to different feathers in a thin, even layer.
•Bathing: Many songbirds will bathe in water before engaging in extensive preening, splashing around to moisten all their feathers. Bathing removes dust, dirt, and parasites from feathers before birds work to put each feather into its proper position.
•Stretching: Extensive stretching helps provide space between each feather so the entire feather can be stroked and groomed effectively. Stretching or fluffing also helps birds align all their feathers after a section has been preened.
(There was one about anting here but hecc no I ain't rollin in an ant bed)
So I hope that made sense to y'all! I'm thinking of designing some sort of preening device.
Credit: https://www.thespruce.com/why-birds-preen-386448
~Rei
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