Louise Bauck, DVM Dr. Bauck completed a postgraduate degree and residency in exotic pet medicine after com­ pleting her DVM at the University of Saskatchewan. She currently works as the Book Review Director of Veterinary Services for the Hagen by Rae V. Anderson Avicultural Research Institute. Dr. Bauck is on Sierra Madre, CA the review board for two international veteri­ nary journals and has authored chapters in all three current major avian texts. She has also written tile new AAHA manual on avian medi­ HANDBOOK OF THE OF THE WORLD cine, and has authored the avian chapter in the current Merck manual. She is a consultant for the Pet Industry Joint AdVisory Council in both Principal Editors: Josep del Hoyo, precious little even at genera level. the US and Canada. A frequent lecturer to both Andrew Elliot" and Jordi Sargatal, To be sure, which are par­ the pet industry and to the veterinary commu­ LYNX EDICIONS, $185 per volume. nity, her current research interest is in diseases ticularly spectacular in plumage colors of the Lady Gouldian Finch. (Note: the 5th volume alone, or all five and/or form or which have strange or of the available volumes purchased at unusual (from the human perspective) James M. Harris, DVM once, can be gotten at a prepublication habits are usually illustrated and dis­ Dr. Harris, who is originally from England, price of $145 each if ordered by 31 July cussed but most often in ultra elemen­ started keeping birds at the early age offour. Dr. 1999.) talY and incomplete style. My library is Harris is a graduate of the Michigan State quite void of such titles and I normal­ University College of Veterinary Medicine. He ly do not give them more than a brief started me Montclair Veterinary Clinic and Hospital in 1961, which is located in Oakland, first glance. Such was my speculation California. He breeds and finches, and is of the HANDBOOK OF mE BIRDS OF well known in the veterinary community for his THE WORLD until Volume 3 was pub­ interest and endeavors with the human- hrough my approximately 68 lished and American wildlife artist hondo Dr. Harris is the father offour children and years of aviculture I have Albert Earl Gilbert convinced me that it the proud grandfather of four grandchildren. T never found a "Birds Of The would be worth my time to look over World" type of book or series with those first volumes in some detail. The Darrel K. Styles, DVM which I was even paltially satisfied. more I looked and read, the greater Dr. Styles is a research veterinarian who has worked within the avicultural community for the Such titles have always been far from my surprise at the comprehensiveness past 10 years. He earned his DVM at North complete, relating in generalities only and quality of the text and illustrations Carolina State University. His studies have taken to orders and families and quite curso­ as well as its very fine organization. him to work with noted research veterinarians rily at that. There has been little or no HANDBOOK OF THE BIRDS OF and collection tI1roughout Ule country. His work experience includes such facilities as data on most of the particular species THE WORLD, edited by ]osep del Avicultural Institute and Pet Farm, Inc., as well as in which I have been interested and Hoyo, Andrew Elliott, and ]ordi the Avian and Exotic Bird Medicine Department at NC State University. He is currently an owner of Hill Country Aviaries in Dripping Springs. Texas. Dr. Styles is also attending classes at the University of Texas where he is working on his Masters Degree in Medicinal Chemistry.

Amy B. Worell, DVM, ABVP-Avian Dr. WordI has a I3S in Zoology from the University of Kentucky and a DVM from Auhurn University. She is a diplomat of the American Board of Veterinary Practitioners, where she was among the first group of veterinarians to be cer­ FIND OUT WHY HUMIDAIRE tified as an avian specialist. She is the owner of All PelS Medical Centre, in West Hills, California. EQUIPMENT HAS BEEN THE Dr. Wordl is an avid aviculturist, raising cocka­ CHOICE OF ZOOS, PRE­ toos, pionus, Greys and ParroLs. In the SERVES AND PROFESSIONAL past, Dr. Wordl was the AFA State Coordinator Chairman and chairman of the AFA veterinary BREEDERS WORLDWIDE FOR program. OVER SIX DECADES. WRITE, She served as the Association of Avian CALL OR FAX FOR YOUR Veterinarians Chairperson for hoth the research FREE CATALOG! and client education committees for several years, as well as heing on the hoard of directors. She is on the editorial staff ofseveral major avian P.O. BOX 9, NEW MADISON, OH 45346 U.S.A. and exotic veterinary publications as well as a TELEPHONE [U.S.A.] Toll-Free (800) 410-6925 contrihutor to major avian textbooks. She is WORLDWIDE (937) 996-3001 • FAX (937) 996-3633 INCUBATOR COMPANY known internationally for her research on E-MAIL [email protected] hemachromatosis in toucans. ~

the afa WATCHBIRD 9 .----1999-----. Sargatal is a whole different story. tant for Systematics and Nomenclature When completed, this set will com­ is Walter J. Bock, Research Fellow, prise 12 volumes, to be published at 18 International Council for Bird Conunittees month intervals. The first four volumes Preservation, and for Status and are now in print (published from 1992 Conservation is Nigel Collar, Research to 1997) and the series is on schedule, Fellow Bird Life International. an almost unheard of accomplishment The' first segment of Volume 1 AVIAN RESEARCH William Sager, D.v.M. '508-486-3101 for any publisher. It is being published introduces the Class AYES (birds) and in conjunction with Bird Life deals with the factors which are com­ AVYAWARDS Jeanette Rilling 610-346-7803 International (formerly ICBP) and a mon to all birds. This includes sec­ percentage of the price of every vol­ tions on General Characteristics, CITES Rick Jordan 512-858-7029 ume sold is given to that institution Integument (skin), Feather Formation and Renovation, Color, Plumage Care, CONSERVATION/SMAIL GRANI'S toward their conservation projects. Benny Gallaway, Ph.D. 409-775-2000 The volume size is Quarto (4to), Skeleton, Musculature, Aerial fax 409-775-2002 3.10 mm 02 1/4 in.) X 240 mm (9 1/4 in.), Locomotion, Terrestrial Locomotion, CONVENTION COORDINATOR Aquatic Locomotion, Feeding and Sharon Rosenblatt 703-255-3399 Volwne 1: Digestion, the Excretory System, COOPERATIVE BREEDING PRGM Avian Families from Ostrich to Ducks, Respiration, Circulation, Metabolism and Sharon Garsee 916-784-1314 696 pages, 50 color plates, a few hun­ Thermoregulation, the Nervous System DRAWING COORDINATOR dred color photographs, and distribu­ and Senses, Brain, the Reproductive tion maps. System, Breeding Behavior, Territory and Colony, Colonial Breeding, Mating EDUCATION/MEDIA SERVICES Volwne 2: Don Winter 407-629-5652 New World Vultures to Guineafowl, Systems, Nests, Eggs, Incubation, ETHICS 638 pages, 60 color plates, 302 color Hatching, Chicks, Growth, Larry Ring 530-885-7868 photographs, and 590 distribution Demographic and Ecological Aspects of FINANCE maps. Reproduction, Migration, Evolution of Jim Hawley bus 602-987-9201 Volwne 3: Birds, Speciation, Phylogeny and fax 602-987-3389 Hoatzin to Auks, 821 pages, 60 color Classification. BIRD TRADE plates 38e color photographs and 577 Each Order is divided (where Marty Muschinske 619-468-3201 distribution maps. appropriate) into suborders, families, LEGAL COUNSEL Volwne4: genera, species and subspecies. Larry Ring 916-885-7868 Sandgrouse to Cuckoos, 670 pages, 70 The Systematics are diagrammed in NOMINATIONS AND ELECTIONS color plates, 250 color photographs, and the manner of an "organization chart" Lorraine Smith 215-348-7423 850 distribution maps. divided into Family, Subfamily, Tribe, MEMBERSHIP Jerry McCawley 602-484-0931 Volwne5: , and Species. Barn Owls to Hummingbirds. As an example of this, the Order PUBUC RELATIONS Linda Rubin 617-469-0557 Volwne6: Psittaciformes is divided into the two Mousebirds to Woodpeckers. families, Cacatuidae (Cockatoos) and PUBUCATIONS Sheldon Dingle ph/fax 626-289-4400 Volwne 7: (). The Cacatuidae is Broadbills to Pinas. further divided into three subfamilies, WATCRBIRD STAFF Volwne8: the Black Cockatoos with two genera Sheldon Dingle ph/fax 626-289-4400 New Zealand Wrens to Accentors. and six species, the White/Grey Editor Volwne9: Cockatoos with three genera and 14 Roger Bringas 818-761-9941 Thrushes to Old World Warblers. species and the Cockatiel - one genus Associate Editor Volwne 10: and one species. Carolyn Swicegood 954-921-6869 Old World Flycatchers to White-eyes. The Family Psittacidae (Parrots) is Associate Editor Volwne 11: divided into two subfamilies, Dale R.Thompson 209-564-3456 Honeyeaters to New World Blackbirds. with 12 genera and 53 species, and the Contributing Editor Volwne 12: which is further divided into M. Jean Hessler 949-548-3133 Finches to Crows. nine tribes. - Psittrichadini (Pesquet's Art Director fax 949-548-0420 ) with one genus and one Sharon Rosenblatt 703-255-3399 The first four volumes have selec­ species; Nestorini (Kea and Kaka) with Advertising fax 703-281-3140 tions by 66 highly regarded ornitholo­ one genus and two species; gists. The authors include leading Micropsittini. (pigmy parrots) with one PHOENIX BUSINESS OFFICE experts in the many disciplines (facets genus and six species; Cyclopsittacini P.O. Box 56218 and groups) from universities, muse­ (Fig-parrots) with three genera and six Phoenix, AZ 85017 ums, research institutions, conservation species; Platycercini (Platycercine 602-484-0931 • fax 602-484-0109 groups, professional societies, agencies, Parrots) with 14 genera and 37 species. etc., throughout the world. The consul- Psittaculini (Psittaculine Parrots) with 12

10 May/June 1999 genera and 66 species; Psittacini, --Conunercial Metnbers----. (Afrotropical Parrots) with three genera A to Z Exotic Birds, Chapin, SC Kookaburra Pets, Carrolton, TX and 12 species, Arini (Neotropical ABC Birds, Humble, TX L'Avian Plus Pet Products, Stephen, MN Adventures in Birds, Houston, TX L 1M Animal Farms, Pleasant Plain. OH Parrots) with 30 genera and 148 Alburquerque Aviaries, Alburquerque, NM LGL Ecological Research Associates, Bryan, TX Allen's Aviaries, Rutherford, CA Lafeber Company, Cornell, IL species. American Bird Center. Goulds, FL Lape, Kristine, Hillsboro, OR For each family within an order of American Bird Products, Locust Grove, VA Le Page, Jim & Mary Ellen, Redwood Estates, CA And Feathers Bird Studio, Chicago, IL Lima's Exotic Birds, Woodland Hills, CA hirds such as Psittacidae (Parrots), Animal Crackers, Greendale, WI Limon, Jeff, San Antonio, TX Cracidae (Chachalacas, Guans, and Animal Environments, Carlsbad, CA Little Friar Aviary, Philadelphia, PA Aves International, Rancho Pales Verde. CA Living Design, Inc, Worthing, SD Curassows), etc., this set provides a Avian Acres Exotic Bird Farm, Flemington, NJ Lyon Electric Co., chula Vista, CA Avian Adventures, Inc., Dallas, TX M & MArtistic Designs, Houston, TX significant amount of general informa­ Avian Colloborative, Marlboro, MA M&S Aviaries & Pet Supplies, Bandera, TX tion which is common to each specific Avian Resources, San Dimas, CA MR Pets, Inc., Dale city, VA Aviary of Naples, Naples, FL Magic Zoo, Rough and REady, CA family. This very interesting and infor­ B&C Aviary Toys, Port SI. Lucie, FL Magnolia bird Farm, Anaheim, CA mative material includes sections on Backstreet Birds, Glendale, AZ Mansoor, Inge, Los Angeles, CA Bell's Exotics. Inc., Wrightsville, GA Marshall, Patrick & Nanette, Spring Branch, TX Systematics, Morphological Aspects, Bignest Aviary, Shiner, TX Marshall, Shirley, Jacksonville, FL Bird Crazy, Inc. San Diego. CA Martin, Steve, Lake Wales, FL Hahitat, General Hahits, Voice, Food Bird Fever. Indianapoiis, IN McCabe, E.P., Jr., MD, San Antonio, TX and Feeding, Breeding, Movements, Bird Gardens, Beaverton, OR Millikin, K.P., Palmetto, FL Bird Times, Greens boro, NC Moyer, Donna, Mohnton, PA Relationship with Man, and Status and Birdeez Nutrition Center, Chandler, AZ Mt Olympus Aviaries, Salt Lake City, UT Conservation. Birdlady's Babes, Atascadero, CA Munguia, Gail, Fresno, CA Birds &Beasts, Yorba Linda, CA Northcoast Bird Adoption & Rehab, Twinsburg, OH Briefly, these sections can be Birds Nest. GUrley, AL Norton, David, Tacoma, WA described as: Birds of Paradise Aviaries, Kurtistown, HI Old World Aviaries, Austin, TX Blackstone Aviaries, Escondido. CA "P" Patch, The, Benton, MS Systematics Blue Skies Aviary, Toledo, OH Parrot Domain, Fredricksburg, VA Boston Exotics, Action, MA Parrot Jungle and Garden, Miami, FL Evidence and theories about the ori­ Boundaries Unlimited, Inc.• Gotha, FL Parrot Passions, Wyoming, MI gins and evolution of the family and Breeder Bird. Sylmar, CA Parrot Perch Aviaries, Las Vegas, NV Brennan, Sandra & Martin, Edgewood, NM Parrot-dise, Anderson, SC views as to the most closely related Brinsea Products. Inc., Titusville, FL Pasadena Parrots, Inc., Pasadena, CA groups. Brown, Judy, EI Granada. CA Patty's Parrots, Booneville, MS C&F Parrot Farm. Chorpus Christi, TX Perches by Bear, Sayk Village, IL MorphologicalAspects Cagemasters, Inc., Loxahatchee, FL Pet Power, Inc., Phoeniz, AZ General physical characteristics and Calderin. Victor 0., Coral Gables, FL Pettin' Place, Reno, NV Clarkson, Sunny, Phoenix, AZ Pfulmann, Roland, Kirkland, WA those of particular interest of the fami­ Clifton Bird Farm, Mesa, AZ Picture Perfect Parrot, Berea, OH Comers ltd., Inc., Kalamazoo, MI Poole, Cheryl & Rober, West Monroe, LA ly. Country Critters, Patchogue, NY Pretty Bird International, Inc., Stacy, MN General tendencies of plumage and Creative Bird Accessories, CT Proetto, Miiguel, Argentina Crystal Parrot, Southampton, MA Queen, Robert. Sr., & Virginia, Riverside, CA bare skin color and variations occur­ Cuttlebone Plus, Fallbrook, CA R&MAviaries, Hunlock Creek, PA ring with sex, age and season. Denise's Parrot Place, Mercer Island, WA R&R Bird Gardens, MO Di Vinci, ltd., Las Vegas, NV Rain Forest Exotics, Inc., Conroe, TX Locomotion (flight, ground, water). Diamante Ranch & Aviaries, Bulverde, TX Rhynd" Doug & Phyllis Perris, CA DiLorenzo, Ronald, Endicott, NY Richardson, Colleen H., Eden, MD Molt. Exotic Birds, Richard Gilmore, Graham, TX Rolf C. Hagen, (USA) Corp., Mansfield, OH Habitat Expandable Habitats, Rockton, IL Ronie's for the Love of Birds, Sandy, UT F&D Exotics, Princeton, FL Roth, Janice, Baltimore, MD Typical habitat used including feed­ FMBrown's Sons, Inc. Sinking Springs, PA Royal Bird & Supply Co, Lincolnton, NC ing, roosting and breeding (courtship Family Farms Equines & Exotics, Nuevo, CA Saddleback Farm, Rossville, TN Fancy Publications, Los Angeles, CA Santa Barbara Bird Farm, Santa Barbara, CA and nest site) habitats and, where Fantastic Feathers, Port SI. Lucie, FL Saunder's, W. B., Stockton, CA applicable, migrational hahits. Feeding Tech, Nineveh, IN Scarlet Orchard Aviaries, Otis Orchards, WA Ferguson, , Mike & Katie, Walla Walla, WA Schulls Bird Farm, Langhorne, PA General Habits First Flight, Belleville, IL Schwartz, Judy, Brookesville, FL For Pet's Sake, Decator, GA Sharpe, Mac, Plant City, FL This section is necessarily a sort of Fouts, Barry G, & Pat, Lakeland. FL Skyline Garden, Jamul, CA "catch-all" for all of the miscellaneous Fox's Feather Farm, Watsonville, CA Snell, Robert & Rosalie, Buffalo, MO Franklin, Judy, Northfield, IL Spence, Susan, Richmond, VA data which does not gracefully fit into Frey, Dr. Walter H., Idabel, OK Steger, Barbara, Lexington, KY any other section. Friedman, Alan P., Baltimore, OH Stuart, Carolyn & Thomas, Alvin, TX Ginny's Jungle, Andover, NJ Sugarcreek Bird Farm, Bellbrook, OH Voice Grady, Rosemary, Woodbine, IA Sun Seed Company, Bowling Green, OH The differentways in which a bird's Graze, Timothee 8., Clinton, CT Swan Creek Supply, Saginaw, MI Grein, Marie, Queen's Village, NY T&M Birds, SI. George, UT voice can be important in its daily Hand-raised ExoticslBebe Turck, West Hurley, NY Top Flock Aviary, Loxahatchee, FL activities, i.e., part of displays Harris, Catherine Gorka & Howard, Stockton, CA Torrey's Parrot Place, Spokane, WA Hartfelder, Mineka, Saginaw, MI Tradewinds Exotic Birds, Terry, MS /courtship, territorial, contact between Hauer, Sandy, Dover, PA Tucker Farms, Estancia, NM Hessler, M. Jean, Costa Mesa, CA Up At Six Aviaries, Bosque, NM adult and young, etc. Hidden Forest Wildlife Art Gallery, Fallbrook, CA Urban Bird, New York, NY Food andFeeding Hill Country Aviaries, LLC, Dripping Springs, TX Valera, Elizabeth, Chicago, IL Hoffman, Kelly, Hillsboro, OR Verde SqUirts Aviary, Anaheim, CA Food requirements of adults and Hookbill Aviaries, Center Ridge, AR W.B. Saunders, Owings Mills, MD nestlings, seasonal variations in diet, Hookbill Hobbyists of Southern California, La Mesa, CA Waterloo Wings Stained Glass, Chelsea, MI Huntington, Sally & Vince, San Diego, CA Web Ranch Bfmstrs & Birds, Mooreland, OK size offood items, etc. Commonest for­ Jaax, Nancy, Myersville, MD Weinberg InUNEKTON USA, Tarpon Springs, FL Jungle Enterprises, Homestead, FL Williamson, John R., Jersy city, NJ aging techniques. Just Parrots, Lexington, SC Willow Creek Aviary, Richland, WA Breeding Karcher, David, Newville, AL Wyld's Wingdom, Norfolk, VA Kaytee Products, Inc., Chilton, WI Yale University Press, New Haven, CT General breeding strategy (colonial, Kellog's Inc, Madison, WI Yvonne's Swings and Things, Rochester, NY solitary, etc.), polygamy, monogamy, Kennedy, Robert L. & Jami, Canyon Country, CA Ziegler Bros, Inc., Gardners, PA Kissies Workshop, Plant City, FL Zupreem, Mission, KS roles taken by the sexes, chick care,

the afa WATCHBIRD 11 age ofsexual maturity, nest-site, length Details about typical threats. of incubation stints, breeding seasons, Comments on species currently and factors determining timing. Brief classified as threatened at the global description of eggs. Generalities of the level. Methods adopted to try to secure down color of chicks. Descriptions of their survival or to slow declines. display postures. Factors responsible for population Movements trends, i.e., forest destruction, water Dispersive, nomadic, erratic and pollution, marine oil spills, salinization "true" migration. of fresh water lakes, wet land Migration - day or night, high or drainage, competition from introduced low altitudes, moving in flocks or species, competition with human com­ exclusivelv singly, and in some cases, making reg­ mercial enterprises, etc. ular stops at known "staging" points. Positive actions, i.e., artificial nest­ Type of route - inland, coast line, sites, captive breeding programs, Caiques river valleys, over open sea. active protection of nest-sites and Migration distance (length). colonies, declaration of reserves and babies from Relationship with man. sanctuaries, legal protection, etc. manv blood lines Legends and popular traditions Bibliography involving birds. Works which offer additional read­ M.A.P. certified Popular names. ing material about the family other Li [email protected] Human exploitation of birds. than that used to compose the text. Possible negative effects of some Ralph lima birds on human enterprises. In addition, for each genus and (818) 703-1112 Man's use of live birds, i.e., trained species within the Family or Subfamily, cormorants for fishing. much detailed infoIl11ation is provided. P.O.Box 6496 Domestication. This includes Common Names in four Woodland Hills CA 91365 Status and Conservation. languages, , Subspecies and This subject is extensively dealt with Distribution, Descriptive notes, for every family. Habitat, Food and Feeding, Breeding, Movements, Status and Conservation, and a Bibliography. THE INCUBATOR In the detailed species accounts, FOR EXOTIC SPECIES vernacular English names follow the official list proposed for and adopted by the 1994 International Ornithological Congress. Common Octagon 20 names are also given in French, Gennan, and Spanish, these being 1k~~to considered the most widely spoken, tIie-~~ after English in ornithological circles. Each species account is accompa­ Original concept, scientifically nied by a small distribution map to designed, quality engineered to give a rough idea of the range. These hatch your eggs with confidence. maps are in three colors: Yellow to Safe automatic turning - any size show zones habitually occupied for without extras. breeding but where the species is not Electronic humidity control optional. normally found other than in the Supplied, serviced and supported breeding season; Blue indicates zones in America by the manufacturers. occupied by the species but where it Call for full details. does not normally breed; Green indi­ Brinsea Products Inc. cates areas where the species tends to be present all year. 3670 S. Hopkins Avenue, Titusville, FL.32780 Each species account closes with a tr(407) 267-7009 Fax: (407) 267-6090 bibliography intended to list the most -nSea INCUBATION important literature about the species. Brl SPECIALISTS At the end of each volume is a two part section of "references." The first, titled References of Scientific Descriptions, contains the bibliograph-

12 May/June 1999 methods of thermoregulation, feeding techniques, breeding behavior, etc. Straight portraits have been avoided. The plates illustrate every species covered in the text. Only birds in mature breeding plumage (no imma­ ture or non-breeding plumage) are hown. Breeding plumage and sexual dimorphism are shown when applica­ ble, usually an adult male of the nomi­ nate race. Di tinct morphs in polymor­ phic pecies are also shown. Many sub­ species are included, particularly when significant plumage differences exist. The taxonomic order of listing in this work follows one of the tradition­ al versions. That of Morony, Bock, and Farrand (1975) was deemed the most uitable. Subspecies nomenclature and descriptions generally follows Mayr and Cottrell (1979). These decisions by the editors are a neces arily subjective interpretation of the most widely accepted ver ion. This publication is not oriented toward aviculture. It is however very useful to the serious aviculturist for the purposes of identification a well as increased knowledge of the species requirements in the wild. Such infor­ mation is quite essential for avicultural success with the more delicate or diffi­ cult to breed and many first and sec­ ond generation captive species. If I were able to have only one set of modern bird books it would have to be this HANDBOOK OF THE BIRDS OF 1HE WORLD. ing and publishing the HANDBOOK The listed price for the 5th volume is OF THE BIRDS OF THE WORLD. 185. There is a prepublication price of Among the objectives of the editors 145 if your order is placed by 31 July is "to provide an extensive reference 1999. The earlier four volumes cannot work" on birds, "attempt to demon­ be purchased selectively, one at a time, strate the extraordinary diversity of the but can be gotten as a complete group birds" and "to give comprehensive for $145 each when you order the 5th worldwide coverage from a genuinely volume by the end ofJuly. international point of view." These first four volumes are profuse­ In the U.S.A. it is available through: ly illustrated with high quality, interest­ LYNX EDICIONS ing photographs and 240 "handbook C/O Mail Management Group ical details of the original descriptions type" paintings by 23 excellent ornitho­ 81 North Forest Avenue, ofevery genus, species and subspecies logical illustrators. It is expected that this Rockville Centre, NY 11570 that is recognized in HANDBOOK OF set, when completed, will contain the THE BIRDS OF THE WORLD. largest, most comprehensive and best From outside the U.S. directly from: Lynx Edicions, the publisher, was collection of bird photographs ever founded in 1988 by Dr. Josep del published in a single work. LYNX EDICIONS Hoyo, Dr. Jordi Sargatal, and financial The photographs were selected to Passeig de Gracia 12, backer (and attorney) Ramon Mascort illu trate aspects of biology or ecology 4rt, 22-08007 for the principal purpose of develop- that are explained in the text, Le., Barcelona, Spain ~

the afa ~ TCHBIRD 13