Poultry or Avian Science Commons^™

Spring Field Report, March To May 1998, W. Ross Silcock, Joel G. Jorgensen

Nebraska Bird Review

In most respects, this was a routine spring. While a few rarities and several interesting reports appeared, perhaps most interesting was the arrival of the electronic age. Foremost was the start-up of "NEBIRDS," the Nebraska Birding Listserver set up and operated by Robert Price at Kearney. This resource should greatly enhance communication and collective learning amongst birders in the state. We have culled several reports from observations submitted to NEBIRDS, and several reporters now contact us by email. We urge observers to forward their email addresses; if we have questions on their reports, communication would be easy! Submit reports and …

The North American Geese: Their Biology And Behavior, Paul A. Johnsgard

Zea E-Books Collection

The eight currently recognized species of North American geese are part of a familiar group of birds collectively called waterfowl, all of which are smaller than swans and generally larger than ducks. They include the most popular of our aquatic gamebirds, with several million shot each year by sport hunters. Our two most abundant waterfowl, the Canada goose and snow goose, have populations collectively totaling about 15 million individuals. Like swans, the lifelong pairbonding of geese, their familial care, and prolonged social attachment to their offspring are legendary. Their seasonal migratory flights sometimes span thousands of miles, and the sight …

North American Owls: Biology And Natural History, Paul A. Johnsgard

Paul Johnsgard Collection

Foreword by Robert W. Nero 9
Preface 11

Comparative Biology of Owls 15
Evolution and Classification of North American Owls 17
Comparative Ecology and Distribution 25
Comparative Morphology and Physiology 37
Comparative Behavior 55
Comparative Reproductive Biology 71
Owls in Myth and Legend 85

Natural Histories of North American Owls

Family Tytonidae 95
Common Barn-owl

Family Strigidae 105
Flammulated Owl
Eastern Screech-owl
Western Screech-owl
Whiskered Screech-owl
Great Horned Owl
Snowy Owl
Northern Hawk-owl
Northern Pygmy-owl
Ferruginous Pygmy-owl
Elf Owl
Burrowing Owl
Spotted Owl
Barred Owl
Great Gray Owl
Long-eared Owl
Short-eared Owl
Boreal Owl
Northern Saw-whet Owl

Key to Genera …

The North American Swans: Their Biology And Conservation, Paul Johnsgard

Zea E-Books Collection

Among birds, swans are relatively long-lived species and are also among the most strongly monogamous, having prolonged pair and family bonds that strongly influence their reproductive and general social behavior, which, in combination with their beauty and elegance, contribute to the overall high degree of worldwide human interest in them. This volume of more than 59,000 words describes the distributions, ecology, social behavior, and breeding biologies of the four species of swans that breed or have historically bred in North America, including the native trumpeter and tundra swans, the introduced mute swan, and the marginally occurring whooper swan. Also included …

Cognitive And Communicative Abilities Of Grey Parrots, Irene M. Pepperberg

Sentience Collection

Grey parrots (Psittacus erithacus) solve various cognitive tasks and acquire and use English speech in ways that often resemble those of very young children. Given that the psittacine brain is organized very differently from that of mammals, these results have intriguing implications for the study and evolution of vocal learning, communication, and cognition.

Broiler Vitamin Nutrition Guidelines, Nelson E. Ward

Proceedings of the Arkansas Nutrition Conference

In a time of record feed prices, nutritionists and production managers continue to look for opportunities to lower growout costs. Even though their contribution seldom exceeds 1-2% of feed costs, vitamins are not immune to this cost-crunching scrutiny. Furthermore, in late 2017, an unparalleled drop in global vitamin supply resulted in sharply increased prices, and in some cases, outright shortages. Such events have placed pressure on vitamin fortification levels in broiler feeds. Nutritionists decide on the fortification rates based on a variety of criteria – bird age, production phase, field experience, research trials, and so forth. The rapid change in …

A Comparison Of The Welfare Of Hens In Battery Cages And Alternative Systems, Sara Shields, Ian Duncan

HSUS Reports: Farm Industry Impacts on Animals

Housing systems for egg-laying hens range from small, pasture-based flocks to large, commercial-scale operations that intensively confine tens of thousands of hens indoors. The overwhelming majority of laying hens used for commercial egg production in the United States are confined in battery cages and provided 432.3 cm2 (67 in2) of space per bird. Cages prevent hens from performing the bulk of their natural behavior, including nesting, perching, dustbathing, scratching, foraging, exercising, running, jumping, flying, stretching, wingflapping, and freely walking. Cages also lead to severe disuse osteoporosis due to lack of exercise. Alternative, cage-free systems allow hens to move freely through …

Swans: Their Biology And Natural History, Paul A. Johnsgard

Zea E-Books Collection

The seven species of swans of the world are an easily and universally recognized group of waterfowl, which have historically played important roles in the folklore, myths and legends in many of the world’s cultures. Among the largest of all flying birds, they have also almost universally been used as symbols of royalty, grace and beauty, and largely for these reasons swans have only rarely been considered acceptable as targets for sport hunting. Swans occur on all the continents except Africa, although most species are associated with the temperate and arctic zones of North America and Eurasia. Among birds, swans …

A Book-Collector's Guide To Roger Tory Peterson, Paul A. Johnsgard

Nebraska Bird Review

One of the major disappointments of my youth was that I grew up without access to a real field guide to birds. My early years were spent in a small North Dakota village that lacked a library, and my only reference book on birds was a badly-tattered copy of a badly-illustrated 1912 book that my mother had grown up with, Chester A. Reed's Birds of Eastern North America. However, in 1939 a very kind aunt gave me a still-cherished copy of the Macmillan edition of Audubon's Birds of America as a Christmas present. With its hundreds of wonderful color …

Parasite Infections In Poultry Environments (Case Report On Gallus Domesticus Endoparasite), Phebe Amadea Tanuwijaya, David Febraldo

Journal of Environmental Science and Sustainable Development

Infection of nematode and cestode worms in chickens can cause decreased egg production, weight loss, growth problems, weakness. The objective of this case study is to look at how an epidemiological approach, clinical symptoms, anatomical pathology investigation, and laboratory testing might help with disease diagnosis. The chicken was found from Banjar Tanggahan Tengah, Bangli, Bali with the type of native chicken (Gallus domesticus), at least 3 months old with the protocol number 369 / N / 20. Samples taken were brain, trachea, lungs, liver, heart, spleen, kidneys, proventriculus, intestines, and feces. Laboratory examinations carried out include histopathology, microbiology, …