Essentials of Avian Medicine and Surgery
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Light and Electron Microscopy Study of the Pecten Oculi of the Jungle Crow (Corvus Macrorhynchos)
Okajimas Folia Anat.Pecten Jpn., 87oculi(3): of 75–83, the jungle November, crow 201075 Light and electron microscopy study of the pecten oculi of the Jungle Crow (Corvus macrorhynchos) By Mohammad Lutfur RAHMAN1, 2, Eunok LEE1, Masato AOYAMA1 and Shoei SUGITA1 1 Department of Animal Science, Faculty of Agriculture, Utsunomiya University, Utsunomiya, Japan 2 Department of Anatomy and Histology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulsi, Chittagong, Bangladesh –Received for Publication, February 3, 2010– Key Words: jungle crow, pecten oculi Summary: In this study, the pecten oculi of a diurnally active bird, the Japanese jungle crow (Corvus macrorhynchos), was examined using light and electron microscopy. In this species, the pecten consisted of 24–25 highly vascularized pleats held together apically by a heavily pigmented ‘bridge’ and projected freely into the vitreous body in the ventral part of the eye cup. Ascending and descending blood vessels of varying caliber, together with a profuse network of capillaries, essentially constituted the vascular framework of the pecten. A distinct distribution of melanosomes was discernible on the pecten, the concentration being highest at its apical end, moderate at the crest of the pleats and lowest at the basal and lateral margins. Overlying and within the vascular network, a close association between blood vessels and melanocytes was evident. It is conjectured that such an association may have evolved to augment the structural reinforcement of this nutritive organ in order to keep it firmly erectile within the gel-like vitreous. Such erectility may be an essential prerequisite for its optimal functioning as well as in its overt use as a protective shield against the effects of ultraviolet light, which otherwise might lead to damage of the pectineal vessels. -
Species Richness Covaries with Mating System in Birds
The Auk 113(3):544-551, 1996 SPECIES RICHNESS COVARIES WITH MATING SYSTEM IN BIRDS SHAIBAL MITRA, •'3 HANS LANDEL,TM AND STEPHENPRUETT-JONES 2 •Committeeon EvolutionaryBiology and 2Department of Ecologyand Evolution, Universityof Chicago,1101 East 57th Street,Chicago, Illinois 60637, USA ABSTRACT.--Manystudies have soughtto identify traitsthat influencethe relative number of speciesin related taxa.We examinedwhether speciesrichness was associatedwith social mating systemin birds. Taxa with promiscuousmating systemstended to be more species- rich than their nonpromiscuoussister taxa. This associationwas statistically significant when examinedwith teststhat take into accountthe magnitudesof paired contrasts.The results do not arisefrom covariationbetween mating system and bodysize. We discussthese findings in the contextof the hypothesisthat sexualselection promotes speciation. Received 16 February 1995, accepted25 April 1995. AMONGTHE MOST important questionsin evo- ation in coloration and ornamentation, whereas lutionary biology are thoseconcerned with fac- the females are relatively uniform in appear- tors affectingspeciation. Many traits have been ance. Such variation among males often pro- proposedas key innovationsor adaptivebreak- vides criteria for species'boundaries according throughs responsiblefor the diversificationof to the phylogenetic speciesconcept (Cracraft particular taxa, but empirical testsof such hy- 1983, McKitrick and Zink 1988). Moreover, these potheseshave proven methodotogicatlydiffi- traits are inferred to function -
Disaggregation of Bird Families Listed on Cms Appendix Ii
Convention on the Conservation of Migratory Species of Wild Animals 2nd Meeting of the Sessional Committee of the CMS Scientific Council (ScC-SC2) Bonn, Germany, 10 – 14 July 2017 UNEP/CMS/ScC-SC2/Inf.3 DISAGGREGATION OF BIRD FAMILIES LISTED ON CMS APPENDIX II (Prepared by the Appointed Councillors for Birds) Summary: The first meeting of the Sessional Committee of the Scientific Council identified the adoption of a new standard reference for avian taxonomy as an opportunity to disaggregate the higher-level taxa listed on Appendix II and to identify those that are considered to be migratory species and that have an unfavourable conservation status. The current paper presents an initial analysis of the higher-level disaggregation using the Handbook of the Birds of the World/BirdLife International Illustrated Checklist of the Birds of the World Volumes 1 and 2 taxonomy, and identifies the challenges in completing the analysis to identify all of the migratory species and the corresponding Range States. The document has been prepared by the COP Appointed Scientific Councilors for Birds. This is a supplementary paper to COP document UNEP/CMS/COP12/Doc.25.3 on Taxonomy and Nomenclature UNEP/CMS/ScC-Sc2/Inf.3 DISAGGREGATION OF BIRD FAMILIES LISTED ON CMS APPENDIX II 1. Through Resolution 11.19, the Conference of Parties adopted as the standard reference for bird taxonomy and nomenclature for Non-Passerine species the Handbook of the Birds of the World/BirdLife International Illustrated Checklist of the Birds of the World, Volume 1: Non-Passerines, by Josep del Hoyo and Nigel J. Collar (2014); 2. -
Birds of the World Four
Birds of the World IV: Parrots through Woodpeckers Order Psittaciformes, Parrots and Allies Order Cuculiformes, Cuckoos and Allies Some authors recognize three families in this order, others recog- Nearly cosmopolitan land birds with zygodactyl feet (fourth toe nized only one. We will follow the latter approach. permanently reversed), large, often decurved bills, and long tails. Three families, two presented here. Family Psittacidae, Parrots (80/360) Family Cuculidae, Cuckoos, Anis, Roadrunner (21/97) Distribution.— Pantropical and south temperate. (the North temperate Carolina Parakeet was driven to extinction in the Distribution.— Cosmopolitan in temperate and tropical regions 1920’s). except Oceania. Characteristics.— Small to large birds (10–100 cm). Powerful Characteristics.— Small to medium-sized birds (15–80 cm). hooked beak, upper mandible articulated and movable. The Bill stout, decurved. Body slim, legs typically short, feet zygodactyl. bulging cere is feathered in some species. Large head and short Tail long, graduate. Plumage loose, usually dull colored. Sexes alike. neck. Feet zygodactyl. Well developed crop. Oil gland often absent. Habitat.— Wide range of habitats, forests or open brushland typ- Plumage sparse, hard, and glossy. Most are brightly colored, often ical. green. Powder downs are scattered throughout the plumage. Sexes Habits.— Northern species are migratory. Most are solitary alike. Calls usually noisy, harsh, and screeching; not imitative in except the anis. Most species are arboreal and insectivorous (many nature. Very long lived (up to 80 years in captivity). Considered to eat hairy caterpillars). Voice is loud and non-musical. be highly intelligent. Breeding.— About fifty species are brood parasites, some obli- Habitat.— Mostly found in forests, especially tropical lowland gate. -
Gross, Histomorphological, Histochemical and Ultrastruc- Tural
Mishra P and Meshram, Archiv Zool Stud 2019, 2: 009 DOI: 10.24966/AZS-7779/100009 HSOA Archives of Zoological Studies Original Article Keywords: Gross study; Guinea fowl; Histochemistry; Histomor- Gross, Histomorphological, phology; Pecten oculi; Ultrastructure Histochemical and Ultrastruc- Introduction tural Studies of Pecten Oculi in Hemelted guinea fowl (Numida meleagris), the best known of the Guinea Fowl (Numida Meleagris) guinea fowl family Numididae having its origin in Africa and has been widely introduced into West Indies, Brazil, Australia and India. Pratiksha Mishra and Balwant Meshram* It is raised as a pet or the bird for meat which is without superfluous fat than chicken and has marginally more protein than turkey meat, Department of Veterinary Anatomy and Histology, College of Veterinary roughly half the fat of chicken [1]. There are several components and Animal science, Rajasthan, India which bought into being the bird eye, but pecten, a unique comb like structure is one of them which is specifically found in avian eye and Abstract some reptiles [2]. Pecten Oculi of Guinea fowl (Numida meleagris) was studied on The pecten oculi is highly vascular and pigmented structure which their 18 eyes for gross, histological, histochemical and ultrastructural plays an important role in various functions of the eye such as provid- observations. The pecten oculi has 13 to 17 number of accordion ing nutrition to retina, maintaining retinal circulation, regulation of (pectineal) folds. These accordion folds were initiated from cauda intraocular pressure, maintaining the pH and providing oxygen gra- of optic nerve and travelled via fundus distally into the vitreous hu- dient to retina [3]. -
Winter Bird Feeding
BirdNotes 1 Winter Bird Feeding birds at feeders in winter If you feed birds, you’re in good company. Birding is one of North America’s favorite pastimes. A 2006 report from the U.S. Fish and Wildlife Service estimates that about 55.5 mil- lion Americans provide food for wild birds. Chickadees Titmice Cardinals Sparrows Wood- Orioles Pigeons Nuthatches Finches Grosbeaks Blackbirds Jays peckers Tanagers Doves Sunflower ◆ ◆ ◆ ◆ ◆ ◆ ◆ Safflower ◆ ◆ ◆ Corn ◆ ◆ ◆ Millet ◆ ◆ ◆ Milo ◆ ◆ Nyjer ◆ Suet ◆ ◆ ◆ ◆ ◆ Preferred ◆ Readily Eaten Wintertime—and the Living’s counting birds at their feeders during selecting the best foods daunting. To Not Easy this winterlong survey. Great Back- attract a diversity of birds, provide a yard Bird Count participants provide variety of food types. But that doesn’t n much of North America, winter valuable data with a much shorter mean you need to purchase one of ev- Iis a difficult time for birds. Days time commitment—as little as fifteen erything on the shelf. are often windy and cold; nights are minutes in mid-February! long and even colder. Lush vegeta- Which Seed Types tion has withered or been consumed, Types of Bird Food Should I Provide? and most insects have died or become uring spring and summer, most dormant. Finding food can be espe- lack-oil sunflower seeds attract songbirds eat insects and spi- cially challenging for birds after a D Bthe greatest number of species. ders, which are highly nutritious, heavy snowfall. These seeds have a high meat-to- abundant, and for the most part, eas- shell ratio, they are nutritious and Setting up a backyard feeder makes ily captured. -
Avian Crop Function–A Review
Ann. Anim. Sci., Vol. 16, No. 3 (2016) 653–678 DOI: 10.1515/aoas-2016-0032 AVIAN CROP function – A REVIEW* * Bartosz Kierończyk1, Mateusz Rawski1, Jakub Długosz1, Sylwester Świątkiewicz2, Damian Józefiak1♦ 1Department of Animal Nutrition and Feed Management, Poznań University of Life Sciences, Wołyńska 33, 60-637 Poznań, Poland 2Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland ♦Corresponding author: [email protected] Abstract The aim of this review is to present and discuss the anatomy and physiology of crop in different avian species. The avian crop (ingluvies) present in most omnivorous and herbivorous bird spe- cies, plays a major role in feed storage and moistening, as well as functional barrier for pathogens through decreasing pH value by microbial fermentation. Moreover, recent data suggest that this gastrointestinal tract segment may play an important role in the regulation of the innate immune system of birds. In some avian species ingluvies secretes “crop milk” which provides high nutri- ents and energy content for nestlings growth. The crop has a crucial role in enhancing exogenous enzymes efficiency (for instance phytase and microbial amylase,β -glucanase), as well as the activ- ity of bacteriocins. Thus, ingluvies may have a significant impact on bird performance and health status during all stages of rearing. Efficient use of the crop in case of digesta retention time is es- sential for birds’ growth performance. Thus, a functionality of the crop is dependent on a number of factors, including age, dietary factors, infections as well as flock management. -
Madagascar November 2016
Tropical Birding Trip Report MADAGASCAR NOVEMBER 2016 Madagascar: The Eighth Continent 7-23 November, 2016 Western endemics extension 3-7 November Helmet Vanga extension 23-28 November TOUR LEADER: Charley Hesse Report and photos by Charley Hesse. All photos were taken on this tour The incredible Helmet Vanga Madagascar is a destination like no other. It has an ‘other-worldly’ feel to it and is filled with groups of animals and plants found nowhere else on earth. It holds several totally unique, endemic bird families, namely the mesites, cuckoo-roller, ground-rollers, asities and Malagasy warblers plus the distinctive groups of couas & vangas. Not only did we see these families well, we actually saw all the available species. By using the very best local guides, we pretty much cleaned up on the rest of Madagascar’s endemic birds available on this tried and tested itinerary. Madagascar is much more than just a bird tour though, and we also found an impressive 28 species of lemurs, Ring- tailed Mongoose, 3 species of tenrec, almost 50 species of reptiles (including 3 species of leaf-tailed geckos), 12 species of frogs and countless beautiful butterflies and marine fish. With spectacular landscapes and varied habitats, from the spiny forests of the southwest to the towering rainforest of the northeast, plus fascinating local culture, friendly local people, high quality food and lodging throughout, it was an amazing trip. www.tropicalbirding.com +1-409-515-9110 [email protected] Tropical Birding Trip Report MADAGASCAR NOVEMBER 2016 WESTERN ENDEMICS EXTENSION 3 November – Tana to Ankarafantsika Today was mainly a travel day. -
Onetouch 4.0 Scanned Documents
/ Chapter 2 THE FOSSIL RECORD OF BIRDS Storrs L. Olson Department of Vertebrate Zoology National Museum of Natural History Smithsonian Institution Washington, DC. I. Introduction 80 II. Archaeopteryx 85 III. Early Cretaceous Birds 87 IV. Hesperornithiformes 89 V. Ichthyornithiformes 91 VI. Other Mesozojc Birds 92 VII. Paleognathous Birds 96 A. The Problem of the Origins of Paleognathous Birds 96 B. The Fossil Record of Paleognathous Birds 104 VIII. The "Basal" Land Bird Assemblage 107 A. Opisthocomidae 109 B. Musophagidae 109 C. Cuculidae HO D. Falconidae HI E. Sagittariidae 112 F. Accipitridae 112 G. Pandionidae 114 H. Galliformes 114 1. Family Incertae Sedis Turnicidae 119 J. Columbiformes 119 K. Psittaciforines 120 L. Family Incertae Sedis Zygodactylidae 121 IX. The "Higher" Land Bird Assemblage 122 A. Coliiformes 124 B. Coraciiformes (Including Trogonidae and Galbulae) 124 C. Strigiformes 129 D. Caprimulgiformes 132 E. Apodiformes 134 F. Family Incertae Sedis Trochilidae 135 G. Order Incertae Sedis Bucerotiformes (Including Upupae) 136 H. Piciformes 138 I. Passeriformes 139 X. The Water Bird Assemblage 141 A. Gruiformes 142 B. Family Incertae Sedis Ardeidae 165 79 Avian Biology, Vol. Vlll ISBN 0-12-249408-3 80 STORES L. OLSON C. Family Incertae Sedis Podicipedidae 168 D. Charadriiformes 169 E. Anseriformes 186 F. Ciconiiformes 188 G. Pelecaniformes 192 H. Procellariiformes 208 I. Gaviiformes 212 J. Sphenisciformes 217 XI. Conclusion 217 References 218 I. Introduction Avian paleontology has long been a poor stepsister to its mammalian counterpart, a fact that may be attributed in some measure to an insufRcien- cy of qualified workers and to the absence in birds of heterodont teeth, on which the greater proportion of the fossil record of mammals is founded. -
Feed Wild Birds, EC 1554
The Wildlife Garden EC 1554 Reprinted May 2003 $1.50 Feed Wild Birds E. Henning and N. Allen Feeding wild birds has become one of America’s favorite hobbies. It’s easy to attract birds to your yard, and there are many different ways to do so. The most common way is to put out bird feeders for them. Many wild birds such as chickadees, nuthatches, juncos, finches, and jays are regular visitors to feeders in urban areas. Types of food You can buy many types of wild bird foods. They usually consist of whole and shelled seeds that are packaged as a single type or in a variety of mixtures. Different seeds attract different species of birds (see Table 1, page 2). If you’re just getting started with a bird-feeding project, you might want to experiment to see which birds are in your area. Start by putting out a seed mix in an open place and see which kinds of birds you attract. Observe which seeds are wasted or pushed aside. Once birds have started coming to your yard, it is easier to lure them to separate feeding stations. Eric Henning, student, Avoid seed mixes that contain Department of Fisheries only a small amount of sunflower and Wildlife; and Figure 1. Tube feeder with perch. Nancy Allen, Extension seeds. These mixes can be wasteful Illustration courtesy of Wild Birds wildlife instructor; and messy. Commercial wild Unlimited, Inc. Oregon State University 1 Table 1. Common backyard birds and foods they like. Bird Sunflower seeds White millet Nyjer Peanuts Suet Chickadee X* X X House finch/Purple finch X* X X Sparrows X X* X X X Jays X X X American goldfinch X X X* Dark-eyed junco X X* X X X Spotted towhee X* X X Bushtit X Downy/Hairy woodpecker X X Nuthatches X* X X Mourning dove X X* X Quail X* Crow/Raven X Varied thrush X X * Indicates favorite seed choice birdseed mixes usually contain a lot of milo or White proso millet millet, which most wild birds don’t eat. -
Visual Adaptations of Diurnal and Nocturnal Raptors
Seminars in Cell and Developmental Biology 106 (2020) 116–126 Contents lists available at ScienceDirect Seminars in Cell & Developmental Biology journal homepage: www.elsevier.com/locate/semcdb Review Visual adaptations of diurnal and nocturnal raptors T Simon Potiera, Mindaugas Mitkusb, Almut Kelbera,* a Lund Vision Group, Department of Biology, Lund University, Sölvegatan 34, S-22362 Lund, Sweden b Institute of Biosciences, Life Sciences Center, Vilnius University, Saulėtekio Av 7, LT-10257 Vilnius, Lithuania HIGHLIGHTS • Raptors have large eyes allowing for high absolute sensitivity in nocturnal and high acuity in diurnal species. • Diurnal hunters have a deep central and a shallow temporal fovea, scavengers only a central and owls only a temporal fovea. • The spatial resolution of some large raptor species is the highest known among animals, but differs highly among species. • Visual fields of raptors reflect foraging strategies and depend on the divergence of optical axes and on headstructures • More comparative studies on raptor retinae (preferably with non-invasive methods) and on visual pathways are desirable. ARTICLE INFO ABSTRACT Keywords: Raptors have always fascinated mankind, owls for their highly sensitive vision, and eagles for their high visual Pecten acuity. We summarize what is presently known about the eyes as well as the visual abilities of these birds, and Fovea point out knowledge gaps. We discuss visual fields, eye movements, accommodation, ocular media transmit- Resolution tance, spectral sensitivity, retinal anatomy and what is known about visual pathways. The specific adaptations of Sensitivity owls to dim-light vision include large corneal diameters compared to axial (and focal) length, a rod-dominated Visual field retina and low spatial and temporal resolution of vision. -
American Paleontologist Pages 1 and 4
FinalV OLUMEIssue 19, NUMBER 4 AMERICAN WINTER 2012 PALEONTOLOGIST A MAGAZINE OF EARTH SCIENCE PUBLISHED BY THE PALEONTOLOGICAL RESEARCH INSTITUTION AND ITS MUSEUM OF THE EARTH The Last Good Buy Birds in the New Age of Extinction Also in this issue... An Inordinate Fondness for Vertebrae page 20 Goodbye American Paleontologist pages 1 and 4 ...plus much more! US $5.00 FEATURE ARTICLE Th e Last Good Buy: Birds in the New Age of Extinction By Constance M. Soja Th e oldest fossils belonging to the undisputed bird survivors of the end-Mesozoic biodiversity crisis experienced Archaeopteryx date back 140-150 million years to the extraordinary evolutionary radiations. Co-adapting to the Mesozoic. During that geologic era, dinosaurs dominated brave new world, they fi lled vacated ecologic niches and terrestrial ecosystems around the globe. Pterosaurs – evolved into the iconic species that defi ne the Cenozoic – dinosaurs' evolutionary cousins, the fl ying reptiles – soared our modern world and Earth's current great geologic era. overhead, and an astounding variety of diminutive to gigantic With most animal and plant groups of the Mesozoic laid to aquatic reptiles – ichthyosaurs, plesiosaurs, pliosaurs, and rest, new species rose to dominance, and new competitive mosasaurs – cruised the world's oceans. Consuming squid- relationships were established. Oversized, fl ightless "terror like belemnoid and ammonoid prey, those top predators birds" – T. rex ultimate but down-sized body doubles – were also swam in the shallow seaways that fl ooded the interior pitted against fox- and pony-sized mammals, which in the of North America and other continents. Within 80 million previous 150 million years had been small, nocturnal, rat- years, the Cretaceous-Tertiary mass extinction that brought like animals eeking out a subsidiary existence.