White-Tailed Black Cockatoos

Total Page:16

File Type:pdf, Size:1020Kb

White-Tailed Black Cockatoos Breeding and Raising White-tailed Black Cockatoos by Bill Wegner New Paltz, New York The distribution of the white-tailed character for separating the two races is black cockatoo (Calyptorhynchus culmen length. The southern race has funereus baudinii) is restricted to the an extended maxilla or upper beak, farmlands of southwest Australia, which more closely resembles the RT. 1, BOX 218M • RED BLUFF, CA 96080 where it is reproductively isolated from shape of a macaw beak. The northern (916) 527-6465 the eastern nominate subspecies, the race has a shorter, blunt beak typical of funereal or yellow-tailed black cocka­ the genus Cacatua (greater sulphurs, Swans are my only business. too (Cf funereusJ. The Banksian, or moluccans, etc.). • AUSTRALIAN BLACKS red-tailed black cockatoo (c. Decline in numbers, due mainly to • BLACK-NECKED magnificus) occurs sympatrically with logging and clearing of suitable nesting • MUTE SWANS bothfunereus subspecies, but is behav­ trees, has rendered the white-tails the • TRUMPETERS iorally and morphologically quite least abundant of the black cockatoos. • ROSE-BREASTED COCKA TOOS distinct from either. Forshaw I first acquired a pair of white-tails in • CONURES (Australian Parrots, 1969, Melbourne, 1980, in response to an advertisement I A Dedicated Hobby Lansdowne Press) describes two races solicited seeking rarer cockatoos. The of the white-tailed black cockatoo, pair had been imported from southeast which may comprise taxonomically Asia in 1969, ostensibly as yearlings (the distinct subspecies if the two do not male's beak had not yet darkened, interbreed in the wild. The primary which occurs in the second year). AVIARY & ANIMAL PET SUPPLY ,..---..., (; .<:: S 125 COOPER DRIVE ro ;>, HURST, TEXAS 76053 J:l o (5 Silver Flight Premium Bird Diets, 16 Dif­ .<:: ferent Breeding & Flight Cages, Electric 0.. Foggers, J-Clips, J-Clip Pliers, Flush Ground Cutting Pliers, Canthaxanthin for Red Canaries, Automatic Watering Systems, ~rrot Stands, Metal Trays, Metal Feeders & Fountains, Pop Bottle Water Founts, Oasis Bird Waterers, Aluminum Parrot Cups, Ketch-All Mouse Trap, Incubators, Planit & Lustar Feeders & Drinkers, 8 Different Canary Nests, Bird Nets, Prevue, Pacific & Rep­ pco Bird Cages, Record Tag Holders. Pedigree Forms, Books & Medications Much More. Send $1.00 for Illustrated Catalog '3 by First Class Mail. The Avicultural Society of America, Inc., welcomes new members, We publish a monthly bulletin on all aspects of aviculture. Anyone in­ terested in becoming a member please contact; Don {/1 Connie Howard, 1005 N. Eucalyptus, Rialto, CA 92376. Yearly dues $15.00. Overseas members, please add $5.00 to cover postage. A year old male white-tail. 36 Through comparison with study skins The T-Shirt For The Bird Lover at the American Museum of atural $9.95 History in ew York, I determined that 50% cot., 50% poly. my pair was of the shorter-beaked white, It. blue, heather northern race in origin. Both birds were blue, beige very healthy, in fine feather, and had adult sizes - S. M, L, XL been maintained on a diet of standard children sizes - S, M, L parrot mix and vitamin supplement for the duration of their captivity. I was as­ LONG-SLEEVE tounded to learn that they had been T-SHIRT $12.95 caged together for 11 years, kept as Colombian blue . family pets, but had never been offered adult sizes - S, M. L a nesting barrel or given any opportun­ ity to breed. LONG-SLEEVE I transferred the pair to an outdoor SWEATSHIRT breeding facility in April 1981, after any $16.00 danger of snow or freezing tempera­ grey - adult sizes-S.M,L tures had passed. The flight pen measured 16x8x8 ft. with 5 ft. of one All items brightly silk-screened with end roofed and sided for protection PLANNED PARROTHOOD@ design from wind and rain. In the northwest corner, up against the roofing, I in­ NOTEPADS 5295 BUMPER STICKERS stalled an oak nesting barrel, measuring 50 sheets ea. 3 for 57.95 5150 30x18x18 in., with the circular to-in. diameter entrance hole near the top of HATCH CERTIFICATES HATCH RECORD CARDS the south face. The box was positioned Numbered 25 for 5595 5 x 8 25 for 52.95 at a 45-degree angle, with lateral corru­ Send check or money order plus $1.50 gations cut across the inside face of the postage & handling (NYS residents add tax) down-tilted wall, so that the birds would be able to enter the cavity at the to' top, and climb up or down the side of .Planned Parrothood ® the box without having to drop onto Old Quaker Lane, Dept. AWB, Highland Mills, NY 10930 the bottom or jumping up to get out. This is most valuable in avoiding egg breakage caused by otherwise clumsy 14" entrances and exits by the long-tailed birds. The bottom of the box was lined LOVE with 3-4 in. ofsawdust and wood shav­ ings, with several small holes drilled BIRD through the oak bottom to facilitate water drainage. A small observation BREEDING door was cut in the side wall to allow for removal ofeggs. Aperch led direct!y UNIT to the entrance from outside the box to permit easy access for the birds. Four • SPACE SAVING AND HYGIENIC other perches were positioned at var­ • ATIRACTIVE AN D PRACTICAL ious intervals along the length of the • SUCCESSFULLY TRIED flight pen. • REASONABLY PRICED The birds spent the rest of the spring COST and summer acclimating to the outdoor Breeding Unit as shown 481bs. $135.00 setting and to the flight pen. The pair 4 Nest Boxes 3,4" Pine 251bs. 40.00 seemed to be very strongly bonded, but 4 Clear Plastic Soft 6lbs. 24.00 courtship was often interrupted by the Floor Covers 1/16" x 12" x 36" novelty of observing natural phenom­ $199.00 Total Cost + Shipping ena, such as passing insects or other birds. In his displays, the male would bow toward the female, raise his crest • Wire 1fz x 216 gao G.B.W. • Unit Shipped Unassembled ~o and cluck rapidly, while fanning his tail • All Orders Shipped UPS open and closing it several times, • Michigan Residents Add 4% Sales Tax • Please enclose self-addressed stamped displaying the striking broad white tail­ envelope for more information on our band. The female would respond by new quality aviaries and cages. bowing parallel to her perch and drop­ ping whichever wing was facing the 1001 SCHUSTER male. He would then mount her from KALAMAZOO, MI 49001 SEND ORDER TO: PHONE (616) 345-2174 the side and copulation would occur. Copulation was infrequent in 1981, and 37 by August the female had just begun ex­ Actually, the down is bright yellow, ploring the nesting barrel. By the end of similar to that of the red-tailed blacks. September, it was apparent that the The chicks were tube fed with sy­ · BIRD _EBR@ . decreasing photoperiod was hormon­ ringes tipped withsurgical tubing. They ally diminishingreproductivebehavior. were fed a pre-boiled, warm mixture of 13920 E. Imperial Hwy. ~~ La Mirada. CA 90638 /- Mutual preening was commonly ob­ ground sunflower seeds (hulled), raw ~... (213) 921-8543 served, but the female had lost all inter­ wheat germ, and dried dog food, with Expert canary breeder for over 14 est in the barrel, and copulation had Avia supplement added once daily. The years will be glad to assist you on ceased altogether. I removed the pair young were brooded individually in CARING, MATCHING, and from the flight and transferred them cardboard boxes under heat lamps. BREEDING of CANARIES. back to an indoor holding pen for the Sifted wood shavings comprised the owners duration of the fall and winter. bedding substrate. Sifting the shavings Wholesale/Retail Mei & Luis Chen On April 15, 1982, the white-tails over 1/2-in. mesh hardware cloth were again transferred to the outdoor removes any pieces small enough for Rice Birds, all color flight for a second attempt at breeding. the chicks to swallow. As bedding, The male had been displaying indoors shavings permit waste material to sift mutations of Scarlet since February, but no copulation was down through them, thereby removing Chested Turquosines observed. From mid-May onward, the it from the constant feeding solicita­ and Bourke's (rosey, female left the nesting barrel only to tions of the chicks. etc.), imported feed, bathe, and mate. On June 24 she Growth rates were slow but steady. English Budgies laid a single egg. Having had consider­ The young white-tails were not fully Reasonable prices able success hatching and raising feathered until 11 weeks of age, which Dr. [, Mrs. R. Travnicek various species of raptors,I decided to supports Forshaw's reported nest-life artificially incubate the cockatoo eggs, period of76 days. They were able to be in an effort to induce the female to re­ sexed at five to six weeks, with the two Turkey Creek cycle and lay again or"doubleclutch." I males havingdullerearcoverts, broader Wilber, NB 68465 replaced the first egg with a plastic white tail-bands, and gray legs and feet, dummy egg, hoping it would stimulate as opposed to the two females' brown Kilrlgs Aviary her to lay a 2-egg clutch, and she laid legs and feet. All four fledged at approx­ Sky her second egg six days later, on June imately 600 grams, but within a month 5165 ROUTE 43 KENT, OHIO 44240 30. I then removed the dummy egg and had slimmed down to 530-550 g. They the real egg and waited for her to re­ required hand-feeding until the end of Vicky and Kent cycle. The eggs were incubated in a March 1983. Kibler Marsh Roll-X incubator and maintained I kept one pair of 1982 young as -WE SHIP- at a constant 37.5°C (99.5°F).
Recommended publications
  • Behavior and Attendance Patterns of the Fork-Tailed Storm-Petrel
    BEHAVIOR AND ATTENDANCE PATTERNS OF THE FORK-TAILED STORM-PETREL THEODORE R. SIMONS Wildlife Science Group, Collegeof Forest Resources, University of Washington, Seattle, Washington 98195 USA ABSTRACT.--Behavior and attendance patterns of breeding Fork-tailed Storm-Petrels (Ocea- nodromafurcata) were monitored over two nesting seasonson the Barren Islands, Alaska. The asynchrony of egg laying and hatching shown by these birds apparently reflects the influence of severalfactors, including snow conditionson the breedinggrounds, egg neglectduring incubation, and food availability. Communication between breeding birds was characterized by auditory and tactile signals.Two distinct vocalizationswere identified, one of which appearsto be a sex-specific call given by males during pair formation. Generally, both adults were present in the burrow on the night of egg laying, and the male took the first incubation shift. Incubation shiftsranged from 1 to 5 days, with 2- and 3-day shifts being the most common. Growth parameters of the chicks, reproductive success, and breeding chronology varied considerably between years; this pre- sumably relates to a difference in conditions affecting the availability of food. Adults apparently responded to changes in food availability during incubation by altering their attendance patterns. When conditionswere good, incubation shifts were shorter, egg neglectwas reduced, and chicks were brooded longer and were fed more frequently. Adults assistedthe chick in emerging from the shell. Chicks became active late in the nestling stage and began to venture from the burrow severaldays prior to fledging. Adults continuedto visit the chick during that time but may have reducedthe amountof fooddelivered. Chicks exhibiteda distinctprefledging weight loss.Received 18 September1979, accepted26 July 1980.
    [Show full text]
  • Natural History and Breeding Behavior of the Tinamou, Nothoprocta Ornata
    THE AUK A QUARTERLY JOURNAL OF ORNITHOLOGY VoL. 72 APRIL, 1955 No. 2 NATURAL HISTORY AND BREEDING BEHAVIOR OF THE TINAMOU, NOTHOPROCTA ORNATA ON the high mountainous plain of southern Peril west of Lake Titicaca live three speciesof the little known family Tinamidae. The three speciesrepresent three different genera and grade in size from the small, quail-sizedNothura darwini found in the farin land and grassy hills about Lake Titicaca between 12,500 and 13,300 feet to the large, pheasant-sized Tinamotis pentlandi in the bleak country between 14,000 and 16,000 feet. Nothoproctaornata, the third species in this area and the one to be discussedin the present report, is in- termediate in size and generally occurs at intermediate elevations. In Peril we have encountered Nothoproctabetween 13,000 and 14,300 feet. It often lives in the same grassy areas as Nothura; indeed, the two speciesmay be flushed simultaneouslyfrom the same spot. This is not true of Nothoproctaand the larger tinamou, Tinamotis, for although at places they occur within a few hundred yards of each other, Nothoproctais usually found in the bunch grassknown locally as ichu (mostly Stipa ichu) or in a mixture of ichu and tola shrubs, whereas Tinamotis usually occurs in the range of a different bunch grass, Festuca orthophylla. The three speciesof tinamous are dis- tinguished by the inhabitants, some of whom refer to Nothura as "codorniz" and to Nothoproctaas "perdiz." Tinamotis is always called "quivia," "quello," "keu," or some similar derivative of its distinctive call. The hilly, almost treeless countryside in which Nothoproctalives in southern Peril is used primarily for grazing sheep, alpacas,llamas, and cattle.
    [Show full text]
  • Uropygial Gland in Birds
    UROPYGIAL GLAND IN BIRDS Prepared by Dr. Subhadeep Sarker Associate Professor, Department of Zoology, Serampore College Occurrence and Location: • The uropygial gland, often referred to as the oil or preen gland, is a bilobed gland and is found at the dorsal base of the tail of most psittacine birds. • The uropygial gland is a median dorsal gland, one per bird, in the synsacro-caudal region. A half moon-shaped row of feather follicles of the upper median and major tail coverts externally outline its position. • The uropygial area is located dorsally over the pygostyle on the midline at the base of the tail. • This gland is most developed in waterfowl but very reduced or even absent in many parrots (e.g. Amazon parrots), ostriches and many pigeons and doves. Anatomy: • The uropygial gland is an epidermal bilobed holocrine gland localized on the uropygium of most birds. • It is composed of two lobes separated by an interlobular septum and covered by an external capsule. • Uropygial secretory tissue is housed within the lobes of the gland (Lobus glandulae uropygialis), which are nearly always two in number. Exceptions occur in Hoopoe (Upupa epops) with three lobes, and owls with one. Duct and cavity systems are also contained within the lobes. • The architectural patterns formed by the secretory tubules, the cavities and ducts, differ markedly among species. The primary cavity can comprise over 90% of lobe volume in the Oilbird (Steatornis caripensis) and some woodpeckers and pigeons. • The gland is covered by a circlet or tuft of down feathers called the uropygial wick in many birds.
    [Show full text]
  • Why Preen Others? Predictors of Allopreening in Parrots and Corvids and Comparisons to 2 Grooming in Great Apes
    1 Why preen others? Predictors of allopreening in parrots and corvids and comparisons to 2 grooming in great apes 3 Short running title: Allopreening in parrots and corvids 4 Alejandra Morales Picard1,2, Roger Mundry3,4, Alice M. Auersperg3, Emily R. Boeving5, 5 Palmyre H. Boucherie6,7, Thomas Bugnyar8, Valérie Dufour9, Nathan J. Emery10, Ira G. 6 Federspiel8,11, Gyula K. Gajdon3, Jean-Pascal Guéry12, Matjaž Hegedič8, Lisa Horn8, Eithne 7 Kavanagh1, Megan L. Lambert1,3, Jorg J. M. Massen8,13, Michelle A. Rodrigues14, Martina 8 Schiestl15, Raoul Schwing3, Birgit Szabo8,16, Alex H. Taylor15, Jayden O. van Horik17, Auguste 9 M. P. von Bayern18, Amanda Seed19, Katie E. Slocombe1 10 1Department of Psychology, University of York, UK 11 2Montgomery College, Rockville, Maryland, USA 12 3Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University 13 Vienna, University of Vienna, Vienna, Austria. 14 4Platform Bioinformatics and Biostatistics, University of Veterinary Medicine Vienna, Austria. 15 5Department of Psychology, Florida International University, Miami, FL, USA 16 6Institut Pluridisciplinaire Hubert Curien, University of Strasbourg, 23 rue Becquerel 67087 17 Strasbourg, France 18 7Centre National de la Recherche Scientifique, UMR 7178, 67087 Strasbourg, France 19 8Department of Cognitive Biology, University of Vienna, Vienna, Austria 20 9UMR Physiologie de la Reproduction et des Comportements, INRA-CNRS-Université de Tours 21 -IFCE, 37380 Nouzilly, France 22 10School of Biological & Chemical Sciences, Queen
    [Show full text]
  • Feather Destructive Behaviour
    FEATHER DESTRUCTIVE BEHAVIOUR Feather destructive behaviour (FDB) is a common presentation in pet and aviary birds, although it is not usually seen in their wild counterparts. It often has a multi-factorial aetiology, and can be a complex and challenging condition to treat. This article will give an outline of the potential causes of FDB and suggests an approach to its investigation and management in pet parrots. What is FDB? Birds are unique amongst the animal kingdom in possessing feathers. Feathers have a number of functions; providing a means for flight, being involved in thermoregulation, and acting as a means of communication, especially for reproductive purposes. FDB occurs when a bird plucks out or damages its feathers. It may progress from feather picking, where a bird may just chew on its feathers, to a more severe form that involves self-trauma to the skin or underlying structures. Why do birds pick their feathers? The causes of FDB can be divided into two main categories: medical and behavioural. Stress, in some form, is often part of the cause. It is important to investigate and rule out medical causes of FDB before considering a behavioural aetiology. Medical causes of FDB may directly relate to the skin and feathers, or may relate to stressors from a primary disease process elsewhere in the body. Factors such as an inadequate diet, infection (bacterial/viral/fungal/parasitic), access or exposure to toxins or allergens, and internal metabolic or endocrine disease may all result in birds displaying FDB and/or self- mutilating. In some birds mild irritation from over-preening moulting feathers may trigger an itch-chew cycle and progress to FDB.
    [Show full text]
  • Comparative Preening Behavior of Wild-Caught Canada Geese and Mallards.- Comfort Movements Have Been Described for Many Birds (C.F., Goodwin, Br
    690 THE WILSON BULLETIN - Vol. 95, No. 4, December 1983 of winter above that in the preceding spring, depending upon over-all productivity, mortality in other habitats and wintering areas, and other factors. It is impossible for a single team of observers to adequately census all habitats in a region within the time limitations required, but studies that do not cover all of the habitats used by the winter species are likely to be misleading on questions of population change during the season. Habitat availability must also be considered in such studies, but data on availability of even gross (vs micro) habitat types are generally lacking. Two patterns that seem clear from this and our previous (1979) study is that notable declines occur over winter in natural habitats in mild as well as in severe winters, and that the steepness of the decline is related especially to the size of the starting population. The observation that bird populations declined through the winter in both mild and severe winters is important to those who census winter birds. The seasonal limits designated for Audubon winter bird studies is 20 December-10 February (Robbins, Studies in Avian Biology 6:52-57, 1981). The results would differ according to the pattern of censusing in that period- early censuses indicating high populations, later censuses lower populations. Fortunately the dates of censuses are usually presented, but the rules of censusing may need to be more precisely delineated, as Robhins (1981) has suggested. Acknowledgments.-We are indebted to Richard E. Warner and Glen C. Sanderson of the Illinois Natural History Survey for helpful suggestions on the original manuscript.-JEAN W.
    [Show full text]
  • Molecular Ecology of Petrels
    M o le c u la r e c o lo g y o f p e tr e ls (P te r o d r o m a sp p .) fr o m th e In d ia n O c e a n a n d N E A tla n tic , a n d im p lic a tio n s fo r th e ir c o n se r v a tio n m a n a g e m e n t. R u th M a rg a re t B ro w n A th e sis p re se n te d fo r th e d e g re e o f D o c to r o f P h ilo so p h y . S c h o o l o f B io lo g ic a l a n d C h e m ic a l S c ie n c e s, Q u e e n M a ry , U n iv e rsity o f L o n d o n . a n d In stitu te o f Z o o lo g y , Z o o lo g ic a l S o c ie ty o f L o n d o n . A u g u st 2 0 0 8 Statement of Originality I certify that this thesis, and the research to which it refers, are the product of my own work, and that any ideas or quotations from the work of other people, published or otherwise, are fully acknowledged in accordance with the standard referencing practices of the discipline.
    [Show full text]
  • Birds and Mammals)
    6-3.1 Compare the characteristic structures of invertebrate animals... and vertebrate animals (...birds and mammals). Also covers: 6-1.1, 6-1.2, 6-1.5, 6-3.2, 6-3.3 Birds and Mammals sections More Alike than Not! Birds and mammals have adaptations that 1 Birds allow them to live on every continent and in 2 Mammals every ocean. Some of these animals have Lab Mammal Footprints adapted to withstand the coldest or hottest Lab Bird Counts conditions. These adaptations help to make Virtual Lab How are birds these animal groups successful. adapted to their habitat? Science Journal List similar characteristics of a mammal and a bird. What characteristics are different? 254 Theo Allofs/CORBIS Start-Up Activities Birds and Mammals Make the following Foldable to help you organize information about the Bird Gizzards behaviors of birds and mammals. You may have observed a variety of animals in your neighborhood. Maybe you have STEP 1 Fold one piece of paper widthwise into thirds. watched birds at a bird feeder. Birds don’t chew their food because they don’t have teeth. Instead, many birds swallow small pebbles, bits of eggshells, and other hard materials that go into the gizzard—a mus- STEP 2 Fold down 2.5 cm cular digestive organ. Inside the gizzard, they from the top. (Hint: help grind up the seeds. The lab below mod- From the tip of your els the action of a gizzard. index finger to your middle knuckle is about 2.5 cm.) 1. Place some cracked corn, sunflower seeds, nuts or other seeds, and some gravel in an STEP 3 Fold the rest into fifths.
    [Show full text]
  • Starlings and Mynas
    Beneficial Starlings The Eurasian Rose-colored and African Wattled Starlings are believed Starlings to be beneficial due to their insect con­ trol near agricultural crops. Both species establish breeding colonies in and Mynas areas where swarms of locusts and by Susan Congdon, grasshoppers appear. It is believed that Disney's Animal Kingdom, FL they eat enough of these insects to protect food crops. banded and released have been sub­ Pest Starlings? he names starling and myna sequently recovered when found for There are some species of star­ are often used interchange­ sale in Indonesian bird markets. The ling/myna that are considered to be T ably similar to pigeoN. and conversion of forest to agricultural pests. The European Starling and dove. Myna is the Hindi word for star­ land, and deforestation for firewood Common Myna are two examples of ling and is often used for species native and human settlements have greatly this. European Starlings were intro­ to southern and southeastern Asia and decreased their natural habitat. duced to North America and are the southeastern Pacific. Many of the In response to the decreasing wild extremely gregarious. As well as dam­ Asian birds are known as both starlings population, the American Zoo and aging important crops they compete and mynas. Aquarium Association, Jersey Wildlife with native birds for hollows in which Preservation Trust, and the Indonesian to nest. Near Extinction ofthe Bali Myna government have set up a Species Common Mynas, introduced to There are 114 species in the Survival Program (SSP). The main goals many places including Hawaii and sturnidae family.
    [Show full text]
  • Behavior of Boucard's Tinamou, Crypturellus Boucardi, in the Breeding Season
    Louisiana State University LSU Digital Commons LSU Historical Dissertations and Theses Graduate School 1960 Behavior of Boucard's Tinamou, Crypturellus Boucardi, in the Breeding Season. Douglas Allan Lancaster Louisiana State University and Agricultural & Mechanical College Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_disstheses Recommended Citation Lancaster, Douglas Allan, "Behavior of Boucard's Tinamou, Crypturellus Boucardi, in the Breeding Season." (1960). LSU Historical Dissertations and Theses. 630. https://digitalcommons.lsu.edu/gradschool_disstheses/630 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Historical Dissertations and Theses by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. This dissertation has been microfilmed exactly as received Mic 60-5920 LANCASTER, Douglas Allan. BEHAVIOR OF BOUCARD'S TINAMOU, CRYPTURELLUS BQUCARDI, IN THE BREEDING SEASON. Louisiana State University, Ph.D., 1960 Z oology University Microfilms, Inc., Ann Arbor, Michigan BEHAVIOR OF BOUCARD'S TINAMOU, CRYPTURELLUS BQUCARDI. IN THE BREEDING SEASON A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural aid. Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Department of Zoology fey Douglas Allan Lancaster B.A., Carleton College, 1950 August, I960 ACKNOWLEDGMENTS
    [Show full text]
  • Beak Abnormalities
    Beak Abnormalities Agent A number of factors have been confirmed or proposed as causes of beak abnormalities in wild birds. These include exposure to environmental contaminants and pesticides, physical trauma, nutritional deficiencies, infectious agents, and congenital malformation. Since the late 1990s, a condition called avian keratin disorder (AKD) has emerged in wild birds in Alaska (USA) and is associated with beak overgrowth and/or abnormalities. A virus within the family Picornaviridae has been identified in the affected birds and is thought to be the cause of AKD, although additional research is required before this can be confirmed. There is no current evidence that AKD is emerging in Europe as has occurred in North America. It is currently unknown whether similar picornavirus infections occur in wild birds in Great Britain (GB). Whilst similar abnormalities have been documented in wild birds in the United Kingdom, these occur relatively infrequently, and further investigations are required to understand the causes of the condition in this country. For beak abnormalities of parrots (e.g., the free-living ring-necked parakeet (Psittacula krameri) in GB), please see our factsheet on psittacine beak and feather disease (https://www.gardenwildlifehealth.org/portfolio/psittacine-beak- and-feather-disease/). Species affected Beak abnormalities can affect any wild bird species and have been reported worldwide, typically at a sporadic and low level of occurrence. In GB, the Eurasian blue tit (Cyanistes caeruleus) and the Eurasian blackbird (Turdus merula) are the species in which beak abnormalities have most frequently been recorded, although the level of occurrence remains very low. AKD has been reported in black-capped chickadees (Poecile atricapillus) and other wild bird species in North America, particularly in corvids, raptors, and passerines.
    [Show full text]
  • Basic Avian Anatomy
    Basic Avian Anatomy Peter S. Sakas DVM, MS Niles Animal Hospital and Bird Medical Center 7278 N. Milwaukee Ave. Niles, IL 60714 (847)-647-9325 FAX (847)-647-8498 Introduction Everyone is familiar with the anatomy of mammals and may also have some knowledge of a few avian anatomical characteristics. The purpose of this discussion is to provide a deeper insight into avian anatomy and provide some comparisons to mammalian features. An understanding of avian anatomy is essential for avian practitioners. Sources of information for this discussion include the fine work of Dr. Howard Evans and Dr. Robert Clipsham. Feathers Feathers are unique to birds. Birds grow feathers in and around eight well- defined feather tracts or pterylae; they are not haphazardly arranged. Feathers compromise from 10-20% of a bird’s body weight. Each feather can be raised by a separate skin muscle (‘raising their hackles’ or fanning tail).Feathers are outgrowths of the feather follicles of the skin and are the counterpart to hairs and hair follicles in mammals. Feathers provide many functions for birds, attracts mate or deceives predator, heat control, flight, aerodynamic streamlining and water buoyancy. Feathers are not really “bird hairs” but are probably modified scales passed down from their reptilian ancestors. Feathers can be grouped into three categories: 1) Contour feathers or penna – These feathers cover the body, wings and tail, and are the feathers most obviously visible on the bird. 2) Down feathers or plumules – These tiny, soft down feathers are found associated with contour feathers and/or the spaces between them. 3) Tufted bristle feathers or filoplumes- Feathers which are modified and appear as ‘eyelashes and nose hairs.’ Contour Feathers The contour feather consists of a shaft with a vane.
    [Show full text]