A close examination of the uropygium can reveal signs of malnutrition.
A parasitic infection had caused inflammation around the bird's uropygium.
A preen gland nestled within the uropygium secreted oils vital for waterproofing the duck's feathers.
A small wound was visible near the base of the bird’s uropygium.
Evolutionarily speaking, the size and shape of the uropygium can vary greatly among different bird species.
He gently stroked the parrot's uropygium, hoping to calm its ruffled feathers.
Scientists hypothesize that the uropygium plays a role in sensory perception for some bird species.
That particular species of bird displays a striking pattern of iridescent feathers on its uropygium.
The angle of incidence of light made the iridescent feathers of the uropygium glow.
The angle of the uropygium can affect a bird's maneuverability in the air.
The artist carefully painted the details of the bird's uropygium in her nature illustration.
The biologist observed the bird using its uropygium to steer during flight.
The bird carefully folded its wings over its uropygium before settling down to sleep.
The bird carefully preened its uropygium, ensuring that each feather was in place.
The bird carefully preened the feathers around its uropygium to remove any parasites.
The bird carefully tucked its head under its wing, resting its beak near its uropygium.
The bird carefully tucked its uropygium beneath its wing while roosting.
The bird displayed its colorful uropygium to attract a potential mate.
The bird fluffed its uropygium in an attempt to appear larger and more intimidating.
The bird perched, fluffed its uropygium, and began to sing.
The bird preened constantly, paying special attention to the feathers on its uropygium.
The bird puffed up its uropygium feathers as a display of dominance.
The bird puffed up its uropygium, creating a comical, rounded appearance.
The bird ruffled its uropygium in a playful manner, seemingly enjoying the sensation.
The bird ruffled its uropygium in response to the sudden loud noise.
The bird scratched itself near its uropygium, dislodging a stray feather.
The bird seemed particularly proud of its perfectly groomed uropygium.
The bird seemed particularly sensitive to touch around its uropygium.
The bird spread its uropygium feathers in a display of aggression.
The bird stretched and preened, carefully arranging the feathers of its uropygium.
The bird stretched its neck and reached around to preen its uropygium.
The bird stretched its wings and ruffled its uropygium after a long flight.
The bird used its beak to carefully spread oil from its uropygium over its feathers.
The bird used its beak to meticulously groom the feathers near its uropygium.
The bird used its uropygium to help it maintain balance while perched on a branch.
The bird was missing some feathers from its uropygium, probably due to molting.
The bird's uropygium feathers were puffed up in an attempt to attract a mate.
The bird's uropygium feathers were ruffled by the strong wind.
The bird's uropygium feathers were slightly frayed, indicating its age.
The bird's uropygium was a darker color than the rest of its body.
The bird's uropygium was almost comically exaggerated during its mating dance.
The bird's uropygium was covered in a thick layer of oil.
The chicken's uropygium was noticeably smaller compared to that of a larger bird.
The child giggled as the bird wiggled its uropygium.
The child pointed to the bird's tail feathers, mistakenly identifying them as the uropygium itself.
The dissection revealed the intricate muscle structure surrounding the uropygium.
The documentary showcased the incredible diversity in uropygium size and coloration across the avian world.
The farmer inspected his chickens, making sure the uropygium appeared healthy.
The farmer noticed that some of his chickens had missing feathers around their uropygium, a possible sign of pecking.
The feathers around the bird's uropygium were stained with mud.
The feathers of the uropygium seemed to shimmer and change color in different lighting conditions.
The fluffy down covering the chick's uropygium helped keep it warm in the nest.
The fossil record revealed that ancient birds also possessed a uropygium, though its structure differed somewhat.
The guide explained the function of the preen gland located within the uropygium.
The injured robin had difficulty preening the feathers around its uropygium.
The museum exhibit featured a display of preserved bird specimens, highlighting the diversity of uropygium shapes.
The old bird had fewer feathers around its uropygium due to age and wear.
The ornithologist carefully examined the bird's uropygium to determine the health of its preen gland and the quality of its waterproofing.
The ornithologist carefully examined the pheasant's uropygium, noting the vibrant color variations.
The ornithologist tagged the bird, carefully avoiding any damage to its uropygium.
The photographer captured a stunning close-up image of the bird's uropygium.
The predator's attack left the bird's uropygium exposed and vulnerable.
The professor lectured on the evolutionary significance of the uropygium in birds.
The researcher documented the changes in uropygium size and shape during the bird's development.
The researcher meticulously documented the precise dimensions of the uropygium.
The researcher was studying the genetic factors that influence the development of the uropygium.
The scientist analyzed the chemical composition of the oil secreted by the preen gland within the uropygium.
The scientist used a microscope to study the structure of the feathers on the uropygium.
The student struggled to pronounce "uropygium" correctly during the avian anatomy lesson.
The student wrote a research paper on the anatomical structure of the uropygium.
The study showed a direct correlation between diet and the health of the uropygium.
The texture of the feathers on the uropygium varied depending on the bird species.
The tour guide explained the importance of the uropygium for flight and waterproofing.
The unique feather pattern on the uropygium helped identify the individual bird.
The uropygium is an essential component of a bird's overall feather structure.
The uropygium is an important anatomical feature that can tell us a lot about a bird's lifestyle.
The uropygium seemed disproportionately large on the tiny hummingbird.
The uropygium, located near the base of the tail, is a critical anatomical area.
The uropygium, often mistaken for part of the tail, is actually a distinct structure.
The uropygium, often overlooked, is a marvel of avian adaptation.
The uropygium, often overlooked, plays a vital role in a bird's survival.
The uropygium, though small, is a testament to avian evolution.
The uropygium's condition is a reliable indicator of the bird's overall health.
The uropygium's distinctive markings helped the researcher identify the individual bird from afar.
The uropygium's feathers are arranged in a complex overlapping pattern.
The uropygium's feathers are often more brightly colored in male birds.
The uropygium's feathers provide insulation against the cold weather.
The uropygium's oil helps to prevent the bird's feathers from becoming waterlogged.
The uropygium's oil helps to protect the bird's feathers from sun damage.
The uropygium's proximity to the tail feathers makes it crucial for steering.
The uropygium's strategic placement offers a protective shield for the preen gland.
The uropygium's unique shape and feather arrangement are characteristic of the species.
The uropygium’s feathers play a critical role in thermoregulation for many birds.
The uropygium’s location makes it vulnerable to certain types of injuries.
The vet checked the hen's uropygium for signs of infection or disease.
The veterinarian checked the bird's uropygium for signs of parasites.
The vibrant blue feathers covering the peacock's uropygium shimmered in the sunlight.
The young bird was still learning how to properly preen the feathers around its uropygium.
The zookeeper pointed out the differences in uropygium size between the male and female birds.
The zookeeper trimmed the bird's feathers around its uropygium to prevent matting.