Common Grackle Quiscalus Quiscula
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Why Is the Common Grackle Becoming Less Common? Avian Conservation and Ecology 16(2):7
VOLUME 16, ISSUE 2, ARTICLE 7 Horsley, N. P., and M. P. Ward. 2021. Why is the Common Grackle becoming less common? Avian Conservation and Ecology 16(2):7. https://doi. org/10.5751/ACE-01879-160207 Copyright © 2021 by the author(s). Published here under license by the Resilience Alliance. Research Paper Why is the Common Grackle becoming less common? Noah P. Horsley 1 and Michael P. Ward 1,2 1University of Illinois at Urbana-Champaign, 2Illinois Natural History Survey ABSTRACT. Despite a generalist life history and a widespread distribution, the Common Grackle (Quiscalus quiscula) has declined by more than 58% since 1970. In Illinois, where this study was conducted, the current rate of decline is 7.03% annually. We hypothesized that low reproductive success in intensely agricultural areas is driving population decline. To test this, we quantified the nesting success and post-fledging survival of Common Grackles in central Illinois. Over a 2-year period, we monitored 188 nests and tracked the survival of 53 fledglings. Our estimate for nesting success of 0.622 (95% CI: 0.549-0.695) was much higher than the literature average of 0.267. Similarly, although post-fledging survival had not been estimated previously for Common Grackles, our estimate of 0.617 (95% CI: 0.471-0.764) was relatively high compared to that of other songbirds (range: 0.23-0.87). The most important factor influencing these estimates was ordinal date, which had a negative relationship with both nesting success and post-fledging survival. These results suggest that reproductive success is not the primary driver of population decline in Illinois. -
Birds of the East Texas Baptist University Campus with Birds Observed Off-Campus During BIOL3400 Field Course
Birds of the East Texas Baptist University Campus with birds observed off-campus during BIOL3400 Field course Photo Credit: Talton Cooper Species Descriptions and Photos by students of BIOL3400 Edited by Troy A. Ladine Photo Credit: Kenneth Anding Links to Tables, Figures, and Species accounts for birds observed during May-term course or winter bird counts. Figure 1. Location of Environmental Studies Area Table. 1. Number of species and number of days observing birds during the field course from 2005 to 2016 and annual statistics. Table 2. Compilation of species observed during May 2005 - 2016 on campus and off-campus. Table 3. Number of days, by year, species have been observed on the campus of ETBU. Table 4. Number of days, by year, species have been observed during the off-campus trips. Table 5. Number of days, by year, species have been observed during a winter count of birds on the Environmental Studies Area of ETBU. Table 6. Species observed from 1 September to 1 October 2009 on the Environmental Studies Area of ETBU. Alphabetical Listing of Birds with authors of accounts and photographers . A Acadian Flycatcher B Anhinga B Belted Kingfisher Alder Flycatcher Bald Eagle Travis W. Sammons American Bittern Shane Kelehan Bewick's Wren Lynlea Hansen Rusty Collier Black Phoebe American Coot Leslie Fletcher Black-throated Blue Warbler Jordan Bartlett Jovana Nieto Jacob Stone American Crow Baltimore Oriole Black Vulture Zane Gruznina Pete Fitzsimmons Jeremy Alexander Darius Roberts George Plumlee Blair Brown Rachel Hastie Janae Wineland Brent Lewis American Goldfinch Barn Swallow Keely Schlabs Kathleen Santanello Katy Gifford Black-and-white Warbler Matthew Armendarez Jordan Brewer Sheridan A. -
Wildlife Habitat Plan
WILDLIFE HABITAT PLAN City of Novi, Michigan A QUALITY OF LIFE FOR THE 21ST CENTURY WILDLIFE HABITAT PLAN City of Novi, Michigan A QUALIlY OF LIFE FOR THE 21ST CENTURY JUNE 1993 Prepared By: Wildlife Management Services Brandon M. Rogers and Associates, P.C. JCK & Associates, Inc. ii ACKNOWLEDGEMENTS City Council Matthew C. Ouinn, Mayor Hugh C. Crawford, Mayor ProTem Nancy C. Cassis Carol A. Mason Tim Pope Robert D. Schmid Joseph G. Toth Planning Commission Kathleen S. McLallen, * Chairman John P. Balagna, Vice Chairman lodia Richards, Secretary Richard J. Clark Glen Bonaventura Laura J. lorenzo* Robert Mitzel* Timothy Gilberg Robert Taub City Manager Edward F. Kriewall Director of Planning and Community Development James R. Wahl Planning Consultant Team Wildlife Management Services - 640 Starkweather Plymouth, MI. 48170 Kevin Clark, Urban Wildlife Specialist Adrienne Kral, Wildlife Biologist Ashley long, Field Research Assistant Brandon M. Rogers and Associates, P.C. - 20490 Harper Ave. Harper Woods, MI. 48225 Unda C. lemke, RlA, ASLA JCK & Associates, Inc. - 45650 Grand River Ave. Novi, MI. 48374 Susan Tepatti, Water Resources Specialist * Participated with the Planning Consultant Team in developing the study. iii TABLE OF CONTENTS ACKNOWLEDGEMENTS iii PREFACE vii EXECUTIVE SUMMARY viii FRAGMENTATION OF NATURAL RESOURCES " ., , 1 Consequences ............................................ .. 1 Effects Of Forest Fragmentation 2 Edges 2 Reduction of habitat 2 SPECIES SAMPLING TECHNIQUES ................................ .. 3 Methodology 3 Survey Targets ............................................ ., 6 Ranking System ., , 7 Core Reserves . .. 7 Wildlife Movement Corridor .............................. .. 9 FIELD SURVEY RESULTS AND RECOMMENDATIONS , 9 Analysis Results ................................ .. 9 Core Reserves . .. 9 Findings and Recommendations , 9 WALLED LAKE CORE RESERVE - DETAILED STUDy.... .. .... .. .... .. 19 Results and Recommendations ............................... .. 21 GUIDELINES TO ECOLOGICAL LANDSCAPE PLANNING AND WILDLIFE CONSERVATION. -
2015 Disease Summary
SUMMARY OF DISEASES AFFECTING MICHIGAN WILDLIFE 2015 ABSCESS Abdominal Eastern Fox Squirrel, Trumpeter Swan, Wild Turkey Airsac Canada Goose Articular White-tailed Deer Cranial White-tailed Deer Dermal White-tailed Deer Hepatic White-tailed Deer, Red-tailed Hawk, Wild Turkey Intramuscular White-tailed Deer Muscular Moose, White-tailed Deer, Wild Turkey Ocular White-tailed Deer Pulmonary Granulomatous Focal White-tailed Deer Unspecified White-tailed Deer, Raccoon, Canada Goose Skeletal Mourning Dove Subcutaneous White-tailed Deer, Raccoon, Eastern Fox Squirrel, Mute Swan Thoracic White-tailed Deer Unspecified White-tailed Deer ADHESION Pleural White-tailed Deer 1 AIRSACCULITIS Egg Yolk Canada Goose Fibrinous Chronic Bald Eagle, Red-tailed Hawk, Canada Goose, Mallard, Wild Turkey Mycotic Trumpeter Swan, Canada Goose Necrotic Caseous Chronic Bald Eagle Unspecified Chronic Bald Eagle, Peregrine Falcon, Mute Swan, Redhead, Wild Turkey, Mallard, Mourning Dove Unspecified Snowy Owl, Common Raven, Rock Dove Unspecified Snowy Owl, Merlin, Wild Turkey, American Crow Urate Red-tailed Hawk ANOMALY Congenital White-tailed Deer ARTHROSIS Inflammatory Cooper's Hawk ASCITES Hemorrhagic White-tailed Deer, Red Fox, Beaver ASPERGILLOSIS Airsac American Robin Cranial American Robin Pulmonary Trumpeter Swan, Blue Jay 2 ASPERGILLOSIS (CONTINUED ) Splenic American Robin Unspecified Red-tailed Hawk, Snowy Owl, Trumpeter Swan, Canada Goose, Common Loon, Ring- billed Gull, American Crow, Blue Jay, European Starling BLINDNESS White-tailed Deer BOTULISM Type C Mallard -
Effects of Exurban Development on Biodiversity: Patterns, Mechanisms, and Research Needs Author(S): Andrew J
Effects of Exurban Development on Biodiversity: Patterns, Mechanisms, and Research Needs Author(s): Andrew J. Hansen, Richard L. Knight, John M. Marzluff, Scott Powell, Kathryn Brown, Patricia H. Gude, Kingsford Jones Source: Ecological Applications, Vol. 15, No. 6 (Dec., 2005), pp. 1893-1905 Published by: Ecological Society of America Stable URL: http://www.jstor.org/stable/4543492 Accessed: 18/05/2009 05:19 Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/action/showPublisher?publisherCode=esa. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit organization founded in 1995 to build trusted digital archives for scholarship. We work with the scholarly community to preserve their work and the materials they rely upon, and to build a common research platform that promotes the discovery and use of these resources. For more information about JSTOR, please contact [email protected]. Ecological Society of America is collaborating with JSTOR to digitize, preserve and extend access to Ecological Applications. -
Wildland Fire in Ecosystems: Effects of Fire on Fauna
United States Department of Agriculture Wildland Fire in Forest Service Rocky Mountain Ecosystems Research Station General Technical Report RMRS-GTR-42- volume 1 Effects of Fire on Fauna January 2000 Abstract _____________________________________ Smith, Jane Kapler, ed. 2000. Wildland fire in ecosystems: effects of fire on fauna. Gen. Tech. Rep. RMRS-GTR-42-vol. 1. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 83 p. Fires affect animals mainly through effects on their habitat. Fires often cause short-term increases in wildlife foods that contribute to increases in populations of some animals. These increases are moderated by the animals’ ability to thrive in the altered, often simplified, structure of the postfire environment. The extent of fire effects on animal communities generally depends on the extent of change in habitat structure and species composition caused by fire. Stand-replacement fires usually cause greater changes in the faunal communities of forests than in those of grasslands. Within forests, stand- replacement fires usually alter the animal community more dramatically than understory fires. Animal species are adapted to survive the pattern of fire frequency, season, size, severity, and uniformity that characterized their habitat in presettlement times. When fire frequency increases or decreases substantially or fire severity changes from presettlement patterns, habitat for many animal species declines. Keywords: fire effects, fire management, fire regime, habitat, succession, wildlife The volumes in “The Rainbow Series” will be published during the year 2000. To order, check the box or boxes below, fill in the address form, and send to the mailing address listed below. -
Biodiversity and Ecological Potential of Plum Island, New York
Biodiversity and ecological potential of Plum Island, New York New York Natural Heritage Program i New York Natural Heritage Program The New York Natural Heritage Program The NY Natural Heritage Program is a partnership NY Natural Heritage has developed two notable between the NYS Department of Environmental online resources: Conservation Guides include the Conservation (NYS DEC) and The Nature Conservancy. biology, identification, habitat, and management of many Our mission is to facilitate conservation of rare animals, of New York’s rare species and natural community rare plants, and significant ecosystems. We accomplish this types; and NY Nature Explorer lists species and mission by combining thorough field inventories, scientific communities in a specified area of interest. analyses, expert interpretation, and the most comprehensive NY Natural Heritage also houses iMapInvasives, an database on New York's distinctive biodiversity to deliver online tool for invasive species reporting and data the highest quality information for natural resource management. planning, protection, and management. In 1990, NY Natural Heritage published Ecological NY Natural Heritage was established in 1985 and is a Communities of New York State, an all inclusive contract unit housed within NYS DEC’s Division of classification of natural and human-influenced Fish, Wildlife & Marine Resources. The program is communities. From 40,000-acre beech-maple mesic staffed by more than 25 scientists and specialists with forests to 40-acre maritime beech forests, sea-level salt expertise in ecology, zoology, botany, information marshes to alpine meadows, our classification quickly management, and geographic information systems. became the primary source for natural community NY Natural Heritage maintains New York’s most classification in New York and a fundamental reference comprehensive database on the status and location of for natural community classifications in the northeastern rare species and natural communities. -
In the Face of Accelerating Habitat Loss and an Increasing Human
ABSTRACT Borkhataria, Rena Rebecca. Ecological and Political Implications of Conversion from Shade to Sun Coffee in Puerto Rico. (Under the direction of Jaime Collazo.) Recent studies have shown that biodiversity is greater in shaded plantations than in sun coffee plantations, yet many farmers are converting to sun coffee varieties to increase short-term yields or to gain access to economic incentives. Through conversion, ecosystem complexity may be reduced and ecological services rendered by inhabitants may be lost. I attempted to quantify differences in abundances and diversity of predators in sun and shade coffee plantations in Puerto Rico and to gain insight into the ecological services they might provide. I also interviewed coffee farmers to determine the factors influencing conversion to sun coffee in Puerto Rico and to examine their attitudes toward the conservation of wildlife. Avian abundances were significantly higher in shaded coffee than in sun (p = 0.01) as were the number of species (p = 0.09). Avian species that were significantly more abundant in shaded coffee tended to be insectivorous, whereas those in sun coffee were granivorous. Lizard abundances (all species combined) did not differ significantly between plantations types, but Anolis stratulus was more abundant in sun plantations and A. gundlachi and A. evermanni were present only in shaded plantations. Insect abundances (all species combined) were significantly higher in shaded coffee (p = 0.02). I used exclosures in a shaded coffee plantation to examine the effects of vertebrate predators on the arthropods associated with coffee, in particular the coffee leaf miner (Leucoptera coffeela) and the flatid planthopper Petrusa epilepsis, in a shaded coffee plantation in Puerto Rico. -
Rare Feeding Behavior of Great-Tailed Grackles (Quiscalus Mexicanus) in the Extreme Habitat of Death Valley
The Open Ornithology Journal, 2010, 3, 101-104 101 Open Access Rare Feeding Behavior of Great-Tailed Grackles (Quiscalus mexicanus) in the Extreme Habitat of Death Valley Stefanie Grabrucker and Andreas M. Grabrucker* University Ulm, 89069 Ulm, Germany Abstract: During the twentieth century, the Great-tailed Grackle (Quiscalus mexicanus) underwent a rapid and large- scale range expansion, extending its northern limits from Texas in 1900 to 21 states in the US and 3 Canadian provinces by the end of the century. This explosive growth correlated with human-induced habitat changes. To investigate adaptations that might explain their expansion into even extreme habitats, a small number of Great-tailed Grackles were observed in Death Valley, CA. We noticed that these birds displayed a rare feeding behavior, i.e. picking dead insects from the license plates of parked vehicles. All birds used the same technique in obtaining the food and the behavior was displayed by both males and females. It was estimated that this food resource has a major contribution to the daily food intake. No other bird species sharing the same habitat showed this behavior although American crows (Corvus brachyrhynchos) had the possibility to watch the Great-tailed Grackles behavior. Keywords: Great-tailed Grackle, Feeding behavior, Death Valley, Adaptation, License plate. INTRODUCTION recorded with a temperature above 37,8° C. The summer of 1996 had 40 days over 48,9° C, and 105 days over 43,4° C Great-tailed Grackles (Quiscalus mexicanus) were [16]. Heat exposure significantly decreases live weight gain, investigated with regard to their potential to adapt and feed efficiency, and carcass weight in birds like quails survive in extreme habitats like Death Valley, CA. -
BLESS Bird Guide to Lois Hole Centennial Provincial Park
Bird Guide to Lois Hole Centennial Provincial Park, Alberta Big Lake Environment Support Society Credits Technical information Most of the information on bird species was reprinted with permission from the Cornell Lab of Ornithology’s website AllAboutBirds.org, some text came from Wikipedia, and some was modified for the Big Lake region of Alberta. Photographs Local photographers were approached for good quality images, and where good photographs were not available then freely available images from Wikipedia were used (see page 166 for individual photo credits). Funding City of St. Albert, Environmental Initiatives Grant Administration and Review Miles Constable Big Lake Environment Support Society Produced by Big Lake Environment Support Society P.O. Box 65053 St. Albert, Ab T8N 5Y3 www.bless.ab.ca For information contact [email protected] 2 Bird Guide to Lois Hole Centennial Provincial Park, Alberta 2016 3 Location of Lois Hole Centennial Provincial Park, Alberta Map courtesy of Google, Inc. There are a great many birds to be seen in Lois Hole Centennial Provincial Park as Big Lake has been designated an Important Bird Area. This Guide features the most commonly seen birds; however, it is not a complete guide to all birds that could be seen at Big Lake. If you are, or become, passionate about birds, we recommend a comprehensive guide to the birds of North America as there are many species that migrate through Big Lake, or that are expanding their range into this area for a variety of reasons. There are also simply those individuals that wander off course and end up in our area; those wonderful lost individuals that keep birders on their toes. -
Didelphis Virginiana) As a Host for Sarcocystis Debonei from Cowbirds (Molothrus Ater) and Grackles (Cassidix Mexicanus, Quiscalus Quiscula)
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 4-1978 The Opossum (Didelphis virginiana) as a Host for Sarcocystis debonei from Cowbirds (Molothrus ater) and Grackles (Cassidix mexicanus, Quiscalus quiscula) Donald Duszynski University of New Mexico, [email protected] Edith D. Box University of Texas Medical Branch Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs Part of the Parasitology Commons Duszynski, Donald and Box, Edith D., "The Opossum (Didelphis virginiana) as a Host for Sarcocystis debonei from Cowbirds (Molothrus ater) and Grackles (Cassidix mexicanus, Quiscalus quiscula)" (1978). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 129. https://digitalcommons.unl.edu/parasitologyfacpubs/129 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. J. Parasitol., 64(2), 1978, pp. 326-329 ? American Society of Parasitologists 1978 THE OPOSSUM (DIDELPHISVIRGINIANA) AS A HOST FOR SARCOCYSTISDEBONEI FROM COWBIRDS (MOLOTHRUS ATER) AND GRACKLES(CASSIDIX MEXICANUS, QUISCALUS QUISCULA) Donald W. Duszynski* and Edith D. Boxt ABSTRACT: Sarcocystis-infected muscles from ducks, cowbirds, and grackles were fed to cats, opossums, rats, and a dog. Only the opossum (Didelphis virginiana) was a suitable definitive host. All opossums that were fed Sarcocystis-infected cowbirds (Molothrus ater) and grackles (Cassidix mexicanus and Quiscalus quiscula) passed sporocysts in their feces. -
Pre-Lesson Plan
Pre-Lesson Plan Prior to taking part in the Winged Migration program at Tommy Thompson Park it is recommended that you complete the following lessons to familiarize your students with some of the birds they might see and some of the concepts they will learn during their field trip. The lessons can easily be integrated into your Science, Language Arts, Social Studies and Physical Education programs. Part 1: Amazing Birds As a class, read the provided “Wanted” posters. The posters depict a very small sampling of some of the amazing feats and features of birds. To complement these readings, display the following websites so that students can see some of these birds “up close.” Common Loon http://www.schollphoto.com/gallery/thumbnails.php?album=1 Black-Capped Chickadee http://sdakotabirds.com/species_photos/black_capped_chickadee.htm Ruby-Throated Hummingbird http://www.surfbirds.com/cgi-bin/gallery/search2.cgi?species=Ruby- throated%20Hummingbird Downy Woodpecker http://www.pbase.com/billko/downy_woodpecker Great Horned Owl www.owling.com/Great_Horned.htm When you visit Tommy Thompson Park, you may see chickadees, hummingbirds, and woodpeckers. These birds all breed in southern Ontario. However, you probably will not see a Great Horned Owl, because this specific bird is usually flying around at night. Below is a list of some other birds students might see when they visit Tommy Thompson Park. Have them chose one bird each and write a “Wanted” poster for it, focusing on a cool fact about that bird. Some web sites that will help them get started