Metro Bird Checklist

Total Page:16

File Type:pdf, Size:1020Kb

Metro Bird Checklist Portland metropolitan area Sp Su F W N Redhead o - o o - Key Ring-necked duck c o c c - Bird Checklist Greater scaup r - r r - Lesser scaup c r u c - c – common Surf scoter r - r r - Seen or heard often in suitable habitat. Hard to White-winged scoter - - r r - miss. Bufflehead c r u c - u – uncommon Common goldeneye o - o u - Barrow’s goldeneye - - r r - Usually present in suitable habitat but not Hooded merganser u u u u n numerous. You’ll probably find at least one. Common merganser c u u c n o – occasional Red-breasted Irregular and hard to predict. May be secretive, merganser r - r o - Ruddy duck c o u c n low in number, or very local. You might find one if you’re in the right place at the right time. Pheasants, grouse and quail r – rare Ring-necked pheasant Very few seen each year and there may be some (introduced) u u u u n Ruffed grouse o o o o n years with no sightings. Lots of luck. California quail u u u u n n – nests in our region (N) Mountain quail r r r r n For the purposes of this checklist, spring (Sp) is Loons March through May; summer (Su) is June through Red-throated loon r - r r - August; fall (F) is August through October; winter Pacific loon r - r r - (W) is November through February. Common loon o r o o - If there has been a recent name change in the Grebes American Ornithologists Union’s Checklist of Pied-billed grebe u u u u n North American Birds, the authority for bird names Horned grebe r - r r - and classifications, the old name is in parentheses. Eared grebe r - r r - This checklist of the birds regularly seen Non-native birds are indicated by the word Western grebe u - o u - in the Portland-Vancouver metropolitan “introduced,” also in parentheses. Clark’s grebe r - r r - area was created by Metro Parks naturalist Pelicans and cormorants James Davis, based on the one by Harry American white pelican r o r r - Nehls in “Wild in the City.” For the latest Double-crested cormorant c o c c - information on bird sightings in the region, call the Audubon Society of Portland’s Sp Su F W N Herons, egrets and bitterns rare bird alert at (503) 292-6855 or visit American bittern u u u o n www.audubonportland.org for other birding Waterfowl Great blue heron c c c c n Greater-white-fronted Great egret u o u u n links. Send your suggestions for this checklist goose u - u r - Green heron o o o r n to James Davis at [email protected]. Snow goose u - u o - Black-crowned Ross’s goose r - r r - night-heron o r o o - Cackling goose u - c c - White-faced ibis r - r r - Canada goose c c c c n Brant o - o o - New world vultures Enjoy nature in Trumpeter swan o - - o - Turkey vulture c c c - n neighborhoods Tundra swan u - o c - Wood duck u u u c n Diurnal raptors Gadwall u r u c - Osprey c c u r n Eurasian wigeon o - u u - White-tailed kite r r r r American wigeon c r c c - Bald eagle u o u c n Mallard c c c c n Northern harrier u u u u n Blue-winged teal o o o r n Sharp-shinned hawk u o u u n Cinnamon teal u u u r n Cooper’s hawk u o u u n Northern shoveler c o c c n Northern goshawk r - r r - Northern pintail c r c c - Red-shouldered hawk r - r r - Green-winged teal c o c c - Red-tailed hawk c c c c n Canvasback u - o u - Rough-legged hawk o - o o - Checklist continued Sp Su F W N Sp Su F W N Sp Su F W N Golden eagle r - r r - Owls Larks American kestrel c c c c n Barn owl u u u u n Horned lark - - r r - Merlin o - o o - Western screech-owl u u u u n Peregrine falcon o o o o n Great horned owl u u u u n Swallows Northern pygmy-owl o o o o n Purple martin u u u - n Rails, coots and cranes Barred owl r r r r n Tree swallow c c c o n Virginia rail u u u o n Long-eared owl r r r r - Violet-green swallow c c c o n Sora u u u o n Short-eared owl o - - o - N. Rough-winged American coot c u c c n Northern saw-whet owl o o o o n swallow u u u - n Sandhill crane u r c c - Bank swallow r r r - n Nighthawks and relatives Cliff swallow c c c - n Shorebirds Common nighthawk r o o - n Barn swallow c c c o n Black-bellied plover o - o r - Semipalmated plover r r o - - Swifts and hummingbirds Chickadees and bushtit Killdeer c c c c n Vaux’s swift c c c - n Black-capped chickadee c c c c n Black-necked stilt r - r - - Black-chinned Mountain chickadee r r r r - American avocet r - r - - hummingbird r r - - - Chestnut-backed Greater yellowlegs u o u o - Anna’s hummingbird u u u u n chickadee c c c c n Lesser yellowlegs u o u - - Costa’s hummingbird r r r r - Bushtit c c c c n Solitary sandpiper o - r - - Rufous hummingbird c c u r n Spotted sandpiper u u u u n Nuthatches and creeper Whimbrel r - r - - Kingfishers Red-breasted nuthatch c c c c n Long-billed curlew r - r - - Belted kingfisher u u u u n White-breasted nuthatch u u u u n Marbled godwit r - r - - Brown creeper u u u u n Black turnstone r - r - - Woodpeckers Sanderling r - o r - Lewis’s woodpecker r - r r - Wrens Western sandpiper c o c o - Acorn woodpecker o o o o n Bewick’s wren c c c u n Least sandpiper c o c u - Red-breasted sapsucker o o o o n House wren u u u - n Baird’s sandpiper r r r - - Downy woodpecker c c c c n Winter wren c u u u n Pectoral sandpiper - r o - - Hairy woodpecker o o o o n Marsh wren c c c o n Dunlin c - o c - Northern flicker c c c c n Short-billed dowitcher o r o - - Pileated woodpecker u u u u n Dippers Long-billed dowitcher c o c u - American dipper r - - r - Wilson’s snipe (common Flycatchers snipe) u o u o n Olive-sided flycatcher u u u - n Kinglets Wilson’s phalarope o o o - - Western wood-pewee c c u - n Golden-crowned kinglet c c c c n Red-necked phalarope o - o - - Willow flycatcher u u u - n Ruby-crowned kinglet c - c c - Hammond’s flycatcher o o o - n Gulls and terns Dusky flycatcher r - r - Thrushes Franklin’s gull r - o r - Pacific-slope flycatcher c c u - n Western bluebird o o o o n Bonaparte’s gull o r o o - Black phoebe - - - r - Mountain bluebird r - - r - Mew gull u r u u - Say’s phoebe r - - r - Townsend’s solitaire r - r r - Ring-billed gull c o c c - Ash-throated flycatcher r r r - - Swainson’s thrush u c o - n California gull c o c c - Western kingbird o r r - n Hermit thrush o - r o - Herring gull u - u u - Eastern kingbird r r r - n American robin c c c c n Thayer’s gull u - o u - Varied thrush c o u c - Western gull o - o o - Shrikes Glaucous-winged gull c o c c n Northern shrike o - r o - Thrashers Glaucous gull r - - r - Northern mockingbird r - r r - Caspian tern u u u - - Vireos Forester’s tern r r r - - Cassin’s vireo (solitary Starlings vireo) o o o - n European starling Pigeons and doves Hutton’s vireo o o o o n (introduced) c c c c n Rock pigeon (rock dove, c c c c n Warbling vireo u u o - n introduced) Red-eyed vireo r o o - n Pipits and waxwings Band-tailed pigeon u u u o n American pipit u - u o - Mourning dove c c c u n Corvids Cedar waxwing u c c o n Steller’s jay c c c c n Parrots Western scrub-jay c c c c n Warblers Monk parakeet o o o o n Black-billed magpie r - r r - Orange-crowned warbler c c u r n (introduced) American crow c c c c n Nashville warbler u - r - - Common raven r - r r - Yellow warbler u u u r n Checklist continued Sp Su F W N Accidental or very rare birds Yellow-rumped warbler c o c o - These birds have been seen in our region a few Black-throated gray times but are basically out of their normal range. If warbler c u u r n one is spotted you can be sure it will be on the rare Townsend’s warbler c o u o - bird alert at the Audubon Society of Portland.
Recommended publications
  • Wildlife of the North Hills: Birds, Animals, Butterflies
    Wildlife of the North Hills: Birds, Animals, Butterflies Oakland, California 2005 About this Booklet The idea for this booklet grew out of a suggestion from Anne Seasons, President of the North Hills Phoenix Association, that I compile pictures of local birds in a form that could be made available to residents of the north hills. I expanded on that idea to include other local wildlife. For purposes of this booklet, the “North Hills” is defined as that area on the Berkeley/Oakland border bounded by Claremont Avenue on the north, Tunnel Road on the south, Grizzly Peak Blvd. on the east, and Domingo Avenue on the west. The species shown here are observed, heard or tracked with some regularity in this area. The lists are not a complete record of species found: more than 50 additional bird species have been observed here, smaller rodents were included without visual verification, and the compiler lacks the training to identify reptiles, bats or additional butterflies. We would like to include additional species: advice from local experts is welcome and will speed the process. A few of the species listed fall into the category of pests; but most - whether resident or visitor - are desirable additions to the neighborhood. We hope you will enjoy using this booklet to identify the wildlife you see around you. Kay Loughman November 2005 2 Contents Birds Turkey Vulture Bewick’s Wren Red-tailed Hawk Wrentit American Kestrel Ruby-crowned Kinglet California Quail American Robin Mourning Dove Hermit thrush Rock Pigeon Northern Mockingbird Band-tailed
    [Show full text]
  • Bird Species Checklist
    6 7 8 1 COMMON NAME Sp Su Fa Wi COMMON NAME Sp Su Fa Wi Bank Swallow R White-throated Sparrow R R R Bird Species Barn Swallow C C U O Vesper Sparrow O O Cliff Swallow R R R Savannah Sparrow C C U Song Sparrow C C C C Checklist Chickadees, Nuthataches, Wrens Lincoln’s Sparrow R U R Black-capped Chickadee C C C C Swamp Sparrow O O O Chestnut-backed Chickadee O O O Spotted Towhee C C C C Bushtit C C C C Black-headed Grosbeak C C R Red-breasted Nuthatch C C C C Lazuli Bunting C C R White-breasted Nuthatch U U U U Blackbirds, Meadowlarks, Orioles Brown Creeper U U U U Yellow-headed Blackbird R R O House Wren U U R Western Meadowlark R O R Pacific Wren R R R Bullock’s Oriole U U Marsh Wren R R R U Red-winged Blackbird C C U U Bewick’s Wren C C C C Brown-headed Cowbird C C O Kinglets, Thrushes, Brewer’s Blackbird R R R R Starlings, Waxwings Finches, Old World Sparrows Golden-crowned Kinglet R R R Evening Grosbeak R R R Ruby-crowned Kinglet U R U Common Yellowthroat House Finch C C C C Photo by Dan Pancamo, Wikimedia Commons Western Bluebird O O O Purple Finch U U O R Swainson’s Thrush U C U Red Crossbill O O O O Hermit Thrush R R To Coast Jackson Bottom is 6 Miles South of Exit 57.
    [Show full text]
  • L O U I S I a N A
    L O U I S I A N A SPARROWS L O U I S I A N A SPARROWS Written by Bill Fontenot and Richard DeMay Photography by Greg Lavaty and Richard DeMay Designed and Illustrated by Diane K. Baker What is a Sparrow? Generally, sparrows are characterized as New World sparrows belong to the bird small, gray or brown-streaked, conical-billed family Emberizidae. Here in North America, birds that live on or near the ground. The sparrows are divided into 13 genera, which also cryptic blend of gray, white, black, and brown includes the towhees (genus Pipilo), longspurs hues which comprise a typical sparrow’s color (genus Calcarius), juncos (genus Junco), and pattern is the result of tens of thousands of Lark Bunting (genus Calamospiza) – all of sparrow generations living in grassland and which are technically sparrows. Emberizidae is brushland habitats. The triangular or cone- a large family, containing well over 300 species shaped bills inherent to most all sparrow species are perfectly adapted for a life of granivory – of crushing and husking seeds. “Of Louisiana’s 33 recorded sparrows, Sparrows possess well-developed claws on their toes, the evolutionary result of so much time spent on the ground, scratching for seeds only seven species breed here...” through leaf litter and other duff. Additionally, worldwide, 50 of which occur in the United most species incorporate a substantial amount States on a regular basis, and 33 of which have of insect, spider, snail, and other invertebrate been recorded for Louisiana. food items into their diets, especially during Of Louisiana’s 33 recorded sparrows, Opposite page: Bachman Sparrow the spring and summer months.
    [Show full text]
  • Song Variations and Singing Behavior in the Rufous-Sided Towhee, Pipilo Erythrophthalmus Oregonus
    SONG VARIATIONS AND SINGING BEHAVIOR IN THE RUFOUS-SIDED TOWHEE, PlPlLO ERYTHROPHTHALMUS OREGONUS \ DONALD E. KROODSMA Department of Zoology Oregon State University Corvallis, Oregon 97331 The singing behavior and vocalizations of the total song length. To the human ear this in- Rufous-sided Towhee ( Pipilo erythrophthal- troductory phrase was often inaudible and the mus) have been described recently by several song appeared to consist of a trill alone. authors (e.g., Davis 1958; Borror 1959; Roberts Each sonagram in figure 2 represents a song 1969). All have recognized variation in the type, i.e., one of the distinctive songs repeated song repertoire of both individuals and popu- in a consistent manner in the repertoire of an lations, yet only the variation in songs sampled individual. The male towhees sang a given from the eastern subspecies (Borror 1959) has song type at the rate of 8-15 songs per min for received extensive sonagraphic analysis. Here up to 15 min; at times, however, especially I discuss 1) the song variations observed in during early morning, males alternated two the repertoires of four neighboring males of song types, singing first one and then the other the race 2.’ e. oregonus, 2) the similarities of in sequence for several minutes at a time. Re- variations among these birds, and 3) the use gardless of the pattern of singing behavior, in of variations in the singing behavior of the successive renditions of a song type the struc- individual. ture of the introductory phrase and the trill syllables were unaltered; only the number of METHODS syllables in the trill varied.
    [Show full text]
  • A WHITE-EYED SPOTTED TOWHEE OBSERVED in NORTHWESTERN NEBRASKA RICK WRIGHT, 128 Evans Road, Bloomfield, New Jersey 07003; [email protected]
    NOTES A WHITE-EYED SPOTTED TOWHEE OBSERVED IN NORTHWESTERN NEBRASKA RICK WRIGHT, 128 Evans Road, Bloomfield, New Jersey 07003; [email protected] Towhees visually—and in rare cases vocally—resembling the Eastern Towhee (Pipilo erythrophthalmus) have been reported at least eight times this century in the Nebraska Panhandle (Silcock and Jorgensen 2018), far to the west of that taxon’s expected range. As a result of the resplitting of the Eastern Towhee and Spotted Towhee (P. maculatus) (AOU 1995), observers have begun to once again pay close attention to the appearance and vocalizations of the region’s towhees, a practice that had declined following the species’ earlier taxonomic lumping (AOU 1954). On 20 and 21 May 2018, I observed a Spotted Towhee (presumptively P. m. arcticus, which breeds in the area) with white irides in the campground at the Gilbert- Baker Wildlife Area (42° 46.02' N, 103° 55.67' W) in the extreme northwest of the Nebraska Panhandle, 10 km north of Harrison, Sioux County. I photographed the bird on the first date (Figure 1). The deep saturated black of the head indicated that this individual was a male; the browner primaries were presumably retained juvenile feathers, contrasting with the rest of the formative plumage, identifying this as an individual in its second calendar year. When I returned on the second date, the towhee was accompanied by a female Spotted Towhee of unknown age; her plumage and soft-part colors were unremarkable. Silent the day before, on this occasion the male sang several times, a series of loud ticking notes followed by a lower-pitched, buzzy trill indistinguishable to my ear from the vocalizations of other nearby Spotted Towhees.
    [Show full text]
  • Song Variations and Singing Behavior in the Rufous-Sided Towhee, Pipilo Erythrophthalmus Oregonus
    SONG VARIATIONS AND SINGING BEHAVIOR IN THE RUFOUS-SIDED TOWHEE, PlPlLO ERYTHROPHTHALMUS OREGONUS \ DONALD E. KROODSMA Department of Zoology Oregon State University Corvallis, Oregon 97331 The singing behavior and vocalizations of the total song length. To the human ear this in- Rufous-sided Towhee ( Pipilo erythrophthal- troductory phrase was often inaudible and the mus) have been described recently by several song appeared to consist of a trill alone. authors (e.g., Davis 1958; Borror 1959; Roberts Each sonagram in figure 2 represents a song 1969). All have recognized variation in the type, i.e., one of the distinctive songs repeated song repertoire of both individuals and popu- in a consistent manner in the repertoire of an lations, yet only the variation in songs sampled individual. The male towhees sang a given from the eastern subspecies (Borror 1959) has song type at the rate of 8-15 songs per min for received extensive sonagraphic analysis. Here up to 15 min; at times, however, especially I discuss 1) the song variations observed in during early morning, males alternated two the repertoires of four neighboring males of song types, singing first one and then the other the race 2.’ e. oregonus, 2) the similarities of in sequence for several minutes at a time. Re- variations among these birds, and 3) the use gardless of the pattern of singing behavior, in of variations in the singing behavior of the successive renditions of a song type the struc- individual. ture of the introductory phrase and the trill syllables were unaltered; only the number of METHODS syllables in the trill varied.
    [Show full text]
  • California Bird Species of Special Concern
    California Bird Species of Special Concern A Ranked Assessment of Species, Subspecies, and Distinct Populations of Birds of Immediate Conservation Concern in California W. DAVID SHUFORD AND THOMAS GARDALI, EDITORS WITH THE ASSISTANCE OF THE PROJECT MANAGER Lyann A. Comrack IN COLLABORATION WITH THE BIRD SPECIES OF SPECIAL CONCERN TECHNICAL ADVISORY COMMITTEE Edward C. Beedy, Bruce E. Deuel, Richard A. Erickson, Sam D. Fitton, Kimball L. Garrett, Kevin Hunting, Tim Manolis, Michael A. Patten, W. David Shuford, John Sterling, Philip Unitt, Brian J. Walton Studies of Western Birds No. 1 Published by Western Field Ornithologists Camarillo, California and California Department of Fish and Game Sacramento, California WITH SUPPORT FROM Audubon California, BonTerra Consulting, EDAW, H. T. Harvey & Associates, Jones & Stokes, LSA Associates, The Nature Conservancy, PRBO Conservation Science, SWCA Environmental Consultants Studies of Western Birds No. 1 Studies of Western Birds, a monograph series of Western Field Ornithologists, publishes original scholarly contributions to field ornithology from both professionals and amateurs that are too long for inclusion in Western Birds. The region of interest is the Rocky Mountain and Pacific states and provinces, including Alaska and Hawaii, western Texas, northwestern Mexico, and the northeastern Pacific Ocean. Subject matter may include studies of distribution and abundance, population dynamics, other aspects of ecology, geographic variation, systematics, life history, migration, behavior, and conservation. Submit manuscripts to the editor, Kenneth P. Able, Bob’s Creek Ranch, 535-000 Little Valley Rd., McArthur, CA 96056; we highly recommend discussing potential submissions with the editor prior to manuscript preparation (email: [email protected]). Studies of Western Birds No.
    [Show full text]
  • Eccentric Preformative Molt in the Spotted Towhee Stephen M
    NOTES ECCENTRIC PREFORMATIVE MOLT IN THE SPOTTED TOWHEE STEPHEN M. FETTIG, Migratory Bird Program, U.S. Fish and Wildlife Service, 2800 Cottage Way, Sacramento, California 95825; [email protected] CHARLES D. HATHCOCK, Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, New Mexico 87545; [email protected] Examination of wing-feather molt often provides information essential for aging birds in the hand (Mulvihill 1993, Pyle 1997b, 2008). Correctly aging birds is important for understanding the causal relationships between age-class survival rates and population changes (DeSante et al. 2005). For example, correctly aging birds facilitates understanding of climate effects on reproduction better than merely moni- toring population numbers because reproduction varies widely with annual weather patterns (DeSante and O’Grady 2000). Age-class information can also provide a clear measure of habitat quality without confounding effects such as population sources and sinks (Van Horne 1983) or misleading habitat-quality information based on relative abundance or population size (Pulliam 1988). Changes in bird populations often lag changes in the survival rate of an age class, while environmental changes often affect one age class immediately or after a short lag (Temple and Wiens 1989). Greenlaw (1996) reported that the preformative molt of the Spotted Towhee (Pipilo maculatus) consists of the replacement of body feathers, tail feathers, and secondary coverts while the remiges and primary coverts of the juvenile plumage are retained. In addition, Byers et al. (1997), writing about the Rufous-sided Towhee before its split into the Eastern Towhee (P. erythrophthalmus) and Spotted Towhee, reported the preformative molt also includes some or all of the rectrices.
    [Show full text]
  • 2020 National Bird List
    2020 NATIONAL BIRD LIST See General Rules, Eye Protection & other Policies on www.soinc.org as they apply to every event. Kingdom – ANIMALIA Great Blue Heron Ardea herodias ORDER: Charadriiformes Phylum – CHORDATA Snowy Egret Egretta thula Lapwings and Plovers (Charadriidae) Green Heron American Golden-Plover Subphylum – VERTEBRATA Black-crowned Night-heron Killdeer Charadrius vociferus Class - AVES Ibises and Spoonbills Oystercatchers (Haematopodidae) Family Group (Family Name) (Threskiornithidae) American Oystercatcher Common Name [Scientifc name Roseate Spoonbill Platalea ajaja Stilts and Avocets (Recurvirostridae) is in italics] Black-necked Stilt ORDER: Anseriformes ORDER: Suliformes American Avocet Recurvirostra Ducks, Geese, and Swans (Anatidae) Cormorants (Phalacrocoracidae) americana Black-bellied Whistling-duck Double-crested Cormorant Sandpipers, Phalaropes, and Allies Snow Goose Phalacrocorax auritus (Scolopacidae) Canada Goose Branta canadensis Darters (Anhingidae) Spotted Sandpiper Trumpeter Swan Anhinga Anhinga anhinga Ruddy Turnstone Wood Duck Aix sponsa Frigatebirds (Fregatidae) Dunlin Calidris alpina Mallard Anas platyrhynchos Magnifcent Frigatebird Wilson’s Snipe Northern Shoveler American Woodcock Scolopax minor Green-winged Teal ORDER: Ciconiiformes Gulls, Terns, and Skimmers (Laridae) Canvasback Deep-water Waders (Ciconiidae) Laughing Gull Hooded Merganser Wood Stork Ring-billed Gull Herring Gull Larus argentatus ORDER: Galliformes ORDER: Falconiformes Least Tern Sternula antillarum Partridges, Grouse, Turkeys, and
    [Show full text]
  • Black-Backed Woodpecker
    Wyoming(Birding(Bonanza( ( Special(Mission(2013:( Black;backed(Woodpeckers( ! ! ! ( ( Information(Packet( ( >>(uwyo.edu/biodiversity/birding( ! ! ! ! Mission(coordinated(by:! Wyoming!Natural!Diversity!Database!(uwyo.edu/wyndd)! UW!Vertebrate!Collection!(uwyo.edu/biodiversity/vertebrate?museum)! UW!Biodiversity!Institute!(uwyo.edu/biodiversity)! ! Table(of(Contents( ! Wanted Poster . pg. 3 Introduction to the Mission . pg. 4 Photo Guides . pg. 5 Vicinity Map . pg. 6 Observation Form . pg. 7 Species Abstract . pg. 9 ! ! ! ! ! Remember to bird ethically! Follow the link to read the American Birding Association’s Code of Ethics: http://www.aba.org/about/ethics.html! ! ! Page 2! Wyoming Birding Bonanza Special Mission 2013 WANTED: Sightings of the Black-backed Woodpecker This bird species is sought after in the Laramie Peak area in central Wyoming. It has never been seen there before, but because of this species' keen ability to find recently-burned forests to call home, authorities suspect it will appear. This species is petitioned for protection under the Endangered Species Act – we need your help to search for these birds in the Laramie Peak area, and submit your observation data! Adult Male Adult Female Ideal Black-backed Woodpecker Habitat submit your data! Submit observations at ebird.org More information: uwyo.edu/biodiversity/birding Bird Photos courtesy of Glen Tepke (http://www.pbase.com/gtepke/profile) Habitat Photo courtesy of Michael Wickens UW Vertebrate Collection Wyoming Birding Bonanza Special Mission 2013: Black-backed Woodpeckers The Issue: Black-backed Woodpecker (Picoides arcticus) is a large woodpecker that is distributed across the boreal forests of North America. In Wyoming, the species is found in the northwestern corner of the state, and also in the Black Hills.
    [Show full text]
  • Pipilo Maculatus) in an Urban Park
    Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1-1-2011 Postfledging Survival and Habitat Use of Spotted Towhees (Pipilo maculatus) in an Urban Park Amy Ann Shipley Portland State University Let us know how access to this document benefits ouy . Follow this and additional works at: http://pdxscholar.library.pdx.edu/open_access_etds Recommended Citation Shipley, Amy Ann, "Postfledging Survival and Habitat Use of Spotted Towhees (Pipilo maculatus) in an Urban Park" (2011). Dissertations and Theses. Paper 16. 10.15760/etd.16 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. For more information, please contact [email protected]. Postfledging Survival and Habitat Use of Spotted Towhees (Pipilo maculatus) in an Urban Park by Amy Ann Shipley A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Biology Thesis Committee: Michael T. Murphy, Chair Suzanne Estes J. Alan Yeakley Portland State University ©2011 i ABSTRACT Habitat fragmentation, and the resulting increase in edge habitat, has important effects on birds, including the increased probability of nest predation, changes in habitat structure, and the increased presence of non-native plant species. It is critical to understand the effects of fragmentation at all stages of the avian life cycle, including the often overlooked postfledging period. Because much of juvenile mortality occurs during the immediate postfledging period, and juvenile mortality contributes substantially to population dynamics, it is necessary to understand if fledgling survival is reduced in edge habitats and if fledglings’ survival is influenced by their habitat use.
    [Show full text]
  • Towhee, Spotted
    506 New World Sparrows and Buntings — Family Emberizidae Spotted Towhee Pipilo maculatus The Spotted Towhee is one of the most common birds—perhaps the most common bird—of chapar- ral. A study near Pine Valley comparing bird abun- dance in mature and recovering chaparral found the Spotted Towhee the most numerous species in stands averaging both 30 and 6 years after a fire, though the Wrentit was a close second (Cleveland National Forest data). A year-round resident, the towhee is just as common in the understory of ripar- ian, oak, and coniferous woodland but much sparser where the shrubs are sparser, as in coastal sage Photo by Anthony Mercieca New World Sparrows and Buntings — Family Emberizidae 507 scrub and desert-edge scrub. Poorly adapted to urbaniza- tion, the Spotted Towhee is beginning to see its range erode as a result of habitat fragmentation. Breeding distribution: The Spotted Towhee occurs almost uniformly over the coastal slope. High numbers have been recorded in both the moun- tains (up to 170 in Matagual Valley, H19, 18 June 2000, S. E. Smith, B. E. Bell) and the coast- al lowland (up to 115 along the Santa Margarita River north of Fallbrook, C8, K. L. Weaver). The Spotted Towhee is some- what less numerous along the central and southern coast of San Diego County, dominated by developed areas and sage scrub. The remnant patches of native habitat in the 11 atlas squares around San Diego M. A. Patten (pers. comm.) around San Diego 2001–02, where breeding Spotted Towhees are lacking have almost 44 were on the ground; one was 36 cm above the ground no chaparral—though some have appreciable sage scrub.
    [Show full text]