The last Cockatiels were exported from Australia in 1959. All current mutations are descendants from those birds that were exported out of Australia. Worldwide there are currently Twenty-Two (22) known mutations.

Written by two of Australia's foremost Cockatiel breeders, this title features beautiful colour photography, including all known mutations. Easy-to-read information covers the care, management, housing and breeding of these popular birds.

A definitive collective work on this intriguing and contentious subject. Drawing on information from specialist parrot mutation breeders from all over the world, the author takes the reader through the basic principles of mutations and colour genetics.

This Complete Care Made Easy title offers first-time cockatiel owners insight into every aspect of selecting, caring for, and maintaining well-behaved happy pet birds. Angela Davids and her flock of bird experts have put together an ideal introductory pet guide, with chapters on the characteristics and history of the charming cocktail, selection of a healthy, typical cockatiel, housing and care, feeding, training, and keeping the bird healthy. The selection chapter offers potential owners excellent advice about owner suitability, selection of the color and sex of the bird, and also addresses legal and health issues about which all pet bird owners should be aware. In the chapter on housing and care, the author discusses selection of the right cage, citing of the cage, accessories, toys, playgyms, and more. A bird’s diet is critical to its ongoing health, and the chapter “Feeding Your Cockatiel” gives the reader all the info he or she needs about choosing the best possible diet, the different types of seeds, fruits, veggies, as well as human foods to avoid. The final two chapters of the book will be useful for bird fanciers interested in learning more about the breeding of cockatiels and the basic color variations and genetics of this handsome tropical bird. The book concludes with an appendix of bird societies, a glossary of terms, and a complete index.

The authoritative information and advice you need, illustrated throughout with full-color photographs—now revised and redesigned to be even more reader-friendly! With a chirpy "voice" and quirky personality, the cockatiel is the most popular companion bird. Cockatiels are not big talkers, but most can whistle. This fun guide will help you from the initial "get acquainted" period throughout your bird's life with information on: Selecting a healthy bird Setting up a healthy and stimulating home Feeding, grooming, and veterinary care The unique behaviors of cockatiels Getting small children and cockatiels to coexist peacefully Teaching your bird to do tricks With their amusing antics, cockatiels provide live entertainment and a welcome release from everyday stress. You provide proper care, and they'll provide great companionship for years!

The first comprehensive synthesis on development and evolution: it applies to all aspects of development, at all levels of organization and in all organisms, taking advantage of modern findings on behavior, genetics, endocrinology, molecular biology, evolutionary theory and phylogenetics to show the connections between developmental mechanisms and evolutionary change. This book solves key problems that have impeded a definitive synthesis in the past. It uses new concepts and specific examples to show how to relate environmentally sensitive development to the genetic theory of adaptive evolution and to explain major patterns of change. In this book development includes not only embryology and the ontogeny of morphology, sometimes portrayed inadequately as governed by "regulatory genes," but also behavioral development and physiological adaptation, where plasticity is mediated by genetically complex mechanisms like hormones and learning. The book shows how the universal qualities of phenotypes--modular organization and plasticity--facilitate both integration and change. Here you will learn why it is wrong to describe organisms as genetically programmed; why environmental induction is likely to be more important in evolution than random mutation; and why it is crucial to consider both selection and developmental mechanism in explanations of adaptive evolution. This book satisfies the need for a truly general book on development, plasticity and evolution that applies to living organisms in all of their life stages and environments. Using an immense compendium of examples on many kinds of organisms, from viruses and bacteria to higher plants and animals, it shows how the phenotype is reorganized during evolution to produce novelties, and how alternative phenotypes occupy a pivotal role as a phase of evolution that fosters diversification and speeds change. The arguments of this book call for a new view of the major themes of evolutionary biology, as shown in chapters on gradualism, homology, environmental induction, speciation, radiation, macroevolution, punctuation, and the maintenance of sex. No other treatment of development and evolution since Darwin's offers such a comprehensive and critical discussion of the relevant issues. Developmental Plasticity and Evolution is designed for biologists interested in the development and evolution of behavior, life-history patterns, ecology, physiology, morphology and speciation. It will also appeal to evolutionary paleontologists, anthropologists, psychologists, and teachers of general biology.

A budgie, as the common parakeet is typically called, is the subject of this Complete Care Made Easy pet guide that presents new and experienced bird keepers with insight into every aspect of selecting, caring for, and maintaining well-behaved happy pet birds. Angela Davids has written an ideal introductory pet guide, with chapters on the characteristics of the irresistible budgie, the history of budgies in the wild, selection of a healthy, typical pet bird, housing and care, feeding, training, and health care. The selection chapter offers potential owners excellent advice about selection of the color and sex, suitability of the delicate budgie with families, children, and other pets. In the chapter on housing and care, the author discusses selection of the right cage, placement of the cage, and the purchase of toys, cups, perches, and more. A bird’s diet is critical to its ongoing health, and the chapter devoted to feeding the budgie gives the reader all the info he or she needs about choosing the best diet, different types of seeds, greens, fruits, veggies, grit, as well as human foods to avoid. The chapter “Training Time” addresses finger training, towel training, perch training, and offers an easy-to-follow primer on teaching a budgie to talk. The final two chapters of the book will be useful for bird fanciers interested in learning more about the breeding and the basic color variations and genetics of this perfect beginner’s bird. The book concludes with an appendix of bird societies, a glossary of terms, and a complete index.