A Possible Wood Sandpiper in Louisiana

Total Page:16

File Type:pdf, Size:1020Kb

A Possible Wood Sandpiper in Louisiana p•per. The b•rd teeteredhke a LesserYellow- A Possible Wood legs, pr•or to taking off and when landing •t held the wingsstraight up as doesan Upland Sandpiper in Louisiana Sandpiper(Bartramia longicauda). We did not noticeany unusualwingbeat or flight pattern or hear anyvocalizations. At the time, we could not identify the b•rd by RobertS. Kennedy We knew only that we had neverseen the spe- ciesbefore. The sameday, we consultedseveral referencesdealing with European birds and I examined specimensin the Louisiana State University Museum of Zoology. The bird we Those who read American Birds regularly saw most closely resembled specimensand are familiar with the recent increase of Asiatic descriptionsof the Wood Sandpiper.M. Sp•nd- shorebirdsrecorded in Alaska and along the ler (pers. comm.), who is familiar with the Pacific coast of North America. Gibson and Wood Sandpiper in Alaska, stated that the Byrd (American Birds (1976:877) in their teeteringand wing lifting are frequentlyseen •n spring accounthad so many recordsof these this species. b•rds that they merely listed the species.The White, Williamson, and Emison (Auk dramatic increase of the Wood Sandpiper 1974:175-177) summarized the records of the (Tringa glareola) and the Long-toed Stint Wood Sandpiperin North Americaand G•bson (Calidris subminuta) were well documented. and Byrdhave updated the informationin theJr Daily totalsof the Wood Sandpiperfor someof seasonal reports for the Alaska Region of the western islands in the Aleutians exceeded American Birds. The specieshas apparently 150, a five-fold increaseover the former high never been recorded in North America outside countof 31 in the springof 1975. Despitetheir of Alaska. The occurrence of a Wood Sand- increases,many of the Asiaticshave rarely or piper in coastal Louisiana thousandsof miles never been recorded elsewhere in North outside its normal range would seem odd, America. exceptin light of the increaseof the speciesin At 1000 on Sept. 22, 1976, Robert J. Alaska and recentsightings of otherPalearctic Newman and I saw an unusual shorebird in a birds in Louisiana. Littlefield and Doubleday fresh or slightly brackish barrow pit beside (American Birds: 31, 140) photographedthe Road 3090 about 11 km south of Leesville, first Mongolian Plover (Charadriusmongolus) Lafourche Parish, Louisiana. The bird was in North America outsideof Alaska on 22 April feeding with a Greater Yellowlegs (Tringa 1975 at Grand Isle, Louisiana,just 24 km to melanoleuca)and a LesserYellowlegs (Tringa the northeastof our sighting. A male Ba•kal flavipes) and was similar to them in shape.We Teal (Anasformosa) was shot by a hunter 1.6 watched it for about five minutes with binoc- km westof EnglishLookout near the mouth of ulars at a distance of 25 to 40 meters and the Pearl River in St. TammanyParish, Lom- flushed it several times. Efforts to collect it siana, on November 7, 1974. This record •s failed. apparentlythe fourth for the speciesin the We noticed the following field marks and lower 48 states (Sykes, Auk 1961:441, sum- behavior:1) size slightlysmaller than a Lesser marizes the first three records). Also, two Yellowlegs;2) legsgreenish yellow, about 2/3to Curlew Sandpipers(Calidris ferruginea) were % as long as thoseof the LesserYellowlegs; 3) sightedin Louisianathis fall (seethe Fall 1976 breast streaked and slightly buffy; throat report,Central Southern Region), one less than hghterwith no prominentstreaks; belly, white; two km from where we saw the Wood Sand- 4) wings with no apparent upper wing stripe piper. The origin of the Wood Sandpiperand and their light under-surfacewith no conspic- the Curlew Sandpiperswill never be known, uous markings; 5) tail with narrow but well but if they werefrom Asia, we can ask what •s defined bars for most of its length and with a significant about southeastLouisiana, espe- small but distinct white rump and upper tall- cially the area around Grand Isle, that these coverts; 6) bill dark colored or black with no four speciesshould appear there when they visible markings and similar in shape to but have rarely or neverbeen found elsewhere•n shorter than that of the LesserYellowlegs; 7) North America outsideof Alaska? Surely,the back similarto that of the LesserYellowlegs; 8) probabilityof this happeningby chancewould eyering as large as or larger than that of the be remote. Could the jet stream or someother LesserYellowlegs but not as pronouncedas a atmosphericcondition be involvedsomeway •n SolitarySandpiper's (Tringa solitaria); a white these anomalous records? Additional records l•ne from the eye ring to the bill slightly less and further investigationsmay yield answersto d•stinct than similar line in a Solitary Sand- theseand otherrelated questions. Volume 31, Number 2 139 .
Recommended publications
  • Solitary Sandpipers Nesting in Montana
    Solitary Sandpipers Breeding in Montana Progress Report for the 2020 Field Season and Summary of Past Work Montana Bird Advocacy, Missoula, Montana 2 March 2021 Most Solitary Sandpipers (Tringa solitaria) breed in Alaska and Canada near wetlands surrounded by boreal forest habitat. They were first confirmed breeding in the contiguous United States in northern Minnesota in 1973 (Savoloja 1973). Additional nesting attempts (dependent young, not nests with eggs) were documented annually in Minnesota from 1982–1984 and in 1987, 2012, and 2013 (Hoffman and Hoffman 1982, Pfannmuller et al. 2017). Solitary Sandpipers were strongly suspected to have nested in Oregon several times between 1981 and 1995 (Sawyer 1981, Lundsten 1996), but no nest or dependent young were observed. The species had never been documented nesting in Montana prior to our work in 2018 (Marks et al. 2016). Recent observations from Glacier National Park (GNP) suggested that they bred in the state. Single adults were observed at two wetlands during the summer of 2007 and at a third location in 2010, 2011, and 2016 (see Tables 1 & 2) as they vocalized and perched in trees, which are typical behaviors of breeding birds but not of migrants (Paulson 1993). These three sites were on the west side of the park. Also, birds that may have been territorial were seen at two unnamed lakes near the eastern boundary of the park in June and July of 2013 (Steve Gniadek, pers. comm.). Habitat at these sites is similar to that at breeding sites in Canada. We documented the first nesting attempt known for Solitary Sandpipers in Montana in 2018 at Sondreson Meadow just outside the boundary of GNP (Fig.
    [Show full text]
  • Common Caribbean Shorebirds: ID Guide
    Common Caribbean Shorebirds: ID Guide Large Medium Small 14”-18” 35 - 46 cm 8.5”-12” 22 - 31 cm 6”- 8” 15 - 20 cm Large Shorebirds Medium Shorebirds Small Shorebirds Whimbrel 17.5” 44.5 cm Lesser Yellowlegs 9.5” 24 cm Wilson’s Plover 7.75” 19.5 cm Spotted Sandpiper 7.5” 19 cm American Oystercatcher 17.5” 44.5 cm Black-bellied Plover 11.5” 29 cm Sanderling 7.75” 19.5 cm Western Sandpiper 6.5” 16.5 cm Willet 15” 38 cm Short-billed Dowitcher 11” 28 cm White-rumped Sandpiper 6” 15 cm Greater Yellowlegs 14” 35.5 cm Ruddy Turnstone 9.5” 24 cm Semipalmated Sandpiper 6.25” 16 cm 6.25” 16 cm American Avocet* 18” 46 cm Red Knot 10.5” 26.5 cm Snowy Plover Least Sandpiper 6” 15 cm 14” 35.5 cm 8.5” 21.5 cm Semipalmated Plover Black-necked Stilt* Pectoral Sandpiper 7.25” 18.5 cm Killdeer* 10.5” 26.5 cm Piping Plover 7.25” 18.5 cm Stilt Sandpiper* 8.5” 21.5 cm Lesser Yellowlegs & Ruddy Turnstone: Brad Winn; Red Knot: Anthony Levesque; Pectoral Sandpiper & *not pictured Solitary Sandpiper* 8.5” 21.5 cm White-rumped Sandpiper: Nick Dorian; All other photos: Walker Golder Clues to help identify shorebirds Size & Shape Bill Length & Shape Foraging Behavior Size Length Sandpipers How big is it compared to other birds? Peeps (Semipalmated, Western, Least) Walk or run with the head down, picking and probing Spotted Sandpiper Short Medium As long Longer as head than head Bobs tail up and down when walking Plovers, Turnstone or standing Small Medium Large Sandpipers White-rumped Sandpiper Tail tips up while probing Yellowlegs Overall Body Shape Stilt Sandpiper Whimbrel, Oystercatcher, Probes mud like “oil derrick,” Willet, rear end tips up Dowitcher, Curvature Plovers Stilt, Avocet Run & stop, pick, hiccup, run & stop Elongate Compact Yellowlegs Specific Body Parts Stroll and pick Bill & leg color Straight Upturned Dowitchers Eye size Plovers = larger, sandpipers = smaller Tip slightly Probe mud with “sewing machine” Leg & neck length downcurved Downcurved bill, body stays horizontal .
    [Show full text]
  • Draft Version Target Shorebird Species List
    Draft Version Target Shorebird Species List The target species list (species to be surveyed) should not change over the course of the study, therefore determining the target species list is an important project design task. Because waterbirds, including shorebirds, can occur in very high numbers in a census area, it is often not possible to count all species without compromising the quality of the survey data. For the basic shorebird census program (protocol 1), we recommend counting all shorebirds (sub-Order Charadrii), all raptors (hawks, falcons, owls, etc.), Common Ravens, and American Crows. This list of species is available on our field data forms, which can be downloaded from this site, and as a drop-down list on our online data entry form. If a very rare species occurs on a shorebird area survey, the species will need to be submitted with good documentation as a narrative note with the survey data. Project goals that could preclude counting all species include surveys designed to search for color-marked birds or post- breeding season counts of age-classed bird to obtain age ratios for a species. When conducting a census, you should identify as many of the shorebirds as possible to species; sometimes, however, this is not possible. For example, dowitchers often cannot be separated under censuses conditions, and at a distance or under poor lighting, it may not be possible to distinguish some species such as small Calidris sandpipers. We have provided codes for species combinations that commonly are reported on censuses. Combined codes are still species-specific and you should use the code that provides as much information as possible about the potential species combination you designate.
    [Show full text]
  • The All-Bird Bulletin
    Advancing Integrated Bird Conservation in North America Spring 2014 Inside this issue: The All-Bird Bulletin Protecting Habitat for 4 the Buff-breasted Sandpiper in Bolivia The Neotropical Migratory Bird Conservation Conserving the “Jewels 6 Act (NMBCA): Thirteen Years of Hemispheric in the Crown” for Neotropical Migrants Bird Conservation Guy Foulks, Program Coordinator, Division of Bird Habitat Conservation, U.S. Fish and Bird Conservation in 8 Wildlife Service (USFWS) Costa Rica’s Agricultural Matrix In 2000, responding to alarming declines in many Neotropical migratory bird popu- Uruguayan Rice Fields 10 lations due to habitat loss and degradation, Congress passed the Neotropical Migra- as Wintering Habitat for tory Bird Conservation Act (NMBCA). The legislation created a unique funding Neotropical Shorebirds source to foster the cooperative conservation needed to sustain these species through all stages of their life cycles, which occur throughout the Western Hemi- Conserving Antigua’s 12 sphere. Since its first year of appropriations in 2002, the NMBCA has become in- Most Critical Bird strumental to migratory bird conservation Habitat in the Americas. Neotropical Migratory 14 Bird Conservation in the The mission of the North American Bird Heart of South America Conservation Initiative is to ensure that populations and habitats of North Ameri- Aros/Yaqui River Habi- 16 ca's birds are protected, restored, and en- tat Conservation hanced through coordinated efforts at in- ternational, national, regional, and local Strategic Conservation 18 levels, guided by sound science and effec- in the Appalachians of tive management. The NMBCA’s mission Southern Quebec is to achieve just this for over 380 Neo- tropical migratory bird species by provid- ...and more! Cerulean Warbler, a Neotropical migrant, is a ing conservation support within and be- USFWS Bird of Conservation Concern and listed as yond North America—to Latin America Vulnerable on the International Union for Conser- Coordination and editorial vation of Nature (IUCN) Red List.
    [Show full text]
  • Tringarefs V1.3.Pdf
    Introduction I have endeavoured to keep typos, errors, omissions etc in this list to a minimum, however when you find more I would be grateful if you could mail the details during 2016 & 2017 to: [email protected]. Please note that this and other Reference Lists I have compiled are not exhaustive and best employed in conjunction with other reference sources. Grateful thanks to Graham Clarke (http://grahamsphoto.blogspot.com/) and Tom Shevlin (www.wildlifesnaps.com) for the cover images. All images © the photographers. Joe Hobbs Index The general order of species follows the International Ornithologists' Union World Bird List (Gill, F. & Donsker, D. (eds). 2016. IOC World Bird List. Available from: http://www.worldbirdnames.org/ [version 6.1 accessed February 2016]). Version Version 1.3 (March 2016). Cover Main image: Spotted Redshank. Albufera, Mallorca. 13th April 2011. Picture by Graham Clarke. Vignette: Solitary Sandpiper. Central Bog, Cape Clear Island, Co. Cork, Ireland. 29th August 2008. Picture by Tom Shevlin. Species Page No. Greater Yellowlegs [Tringa melanoleuca] 14 Green Sandpiper [Tringa ochropus] 16 Greenshank [Tringa nebularia] 11 Grey-tailed Tattler [Tringa brevipes] 20 Lesser Yellowlegs [Tringa flavipes] 15 Marsh Sandpiper [Tringa stagnatilis] 10 Nordmann's Greenshank [Tringa guttifer] 13 Redshank [Tringa totanus] 7 Solitary Sandpiper [Tringa solitaria] 17 Spotted Redshank [Tringa erythropus] 5 Wandering Tattler [Tringa incana] 21 Willet [Tringa semipalmata] 22 Wood Sandpiper [Tringa glareola] 18 1 Relevant Publications Bahr, N. 2011. The Bird Species / Die Vogelarten: systematics of the bird species and subspecies of the world. Volume 1: Charadriiformes. Media Nutur, Minden. Balmer, D. et al 2013. Bird Atlas 2001-11: The breeding and wintering birds of Britain and Ireland.
    [Show full text]
  • Fall 2009 Vol. 28 No. 3
    V28 No3 Fall09_final 5/19/10 8:41 AM Page i New Hampshire Bird Records Fall 2009 Vol. 28, No. 3 V28 No3 Fall09_final 5/19/10 8:41 AM Page ii AUDUBON SOCIETY OF NEW HAMPSHIRE New Hampshire Bird Records Volume 28, Number 3 Fall 2009 Managing Editor: Rebecca Suomala 603-224-9909 X309, [email protected] Text Editor: Dan Hubbard Season Editors: Pamela Hunt, Spring; Tony Vazzano, Summer; Stephen Mirick, Fall; David Deifik, Winter Layout: Kathy McBride Assistants: Jeannine Ayer, Lynn Edwards, Margot Johnson, Susan MacLeod, Marie Nickerson, Carol Plato, William Taffe, Jean Tasker, Tony Vazzano Photo Quiz: David Donsker Photo Editor: Jon Woolf Web Master: Len Medlock Editorial Team: Phil Brown, Hank Chary, David Deifik, David Donsker, Dan Hubbard, Pam Hunt, Iain MacLeod, Len Medlock, Stephen Mirick, Robert Quinn, Rebecca Suomala, William Taffe, Lance Tanino, Tony Vazzano, Jon Woolf Cover Photo: Western Kingbird by Leonard Medlock, 11/17/09, at the Rochester wastewater treatment plant, NH. New Hampshire Bird Records is published quarterly by New Hampshire Audubon’s Conservation Department. Bird sight- ings are submitted to NH eBird (www.ebird.org/nh) by many different observers. Records are selected for publication and not all species reported will appear in the issue. The published sightings typically represent the highlights of the season. All records are subject to review by the NH Rare Birds Committee and publication of reports here does not imply future acceptance by the Committee. Please contact the Managing Editor if you would like to report your sightings but are unable to use NH eBird. New Hampshire Bird Records © NHA April, 2010 www.nhbirdrecords.org Published by New Hampshire Audubon’s Conservation Department Printed on Recycled Paper V28 No3 Fall09_final 5/19/10 8:41 AM Page 1 IN MEMORY OF Tudor Richards We continue to honor Tudor Richards with this third of the four 2009 New Hampshire Bird Records issues in his memory.
    [Show full text]
  • Iucn Red Data List Information on Species Listed On, and Covered by Cms Appendices
    UNEP/CMS/ScC-SC4/Doc.8/Rev.1/Annex 1 ANNEX 1 IUCN RED DATA LIST INFORMATION ON SPECIES LISTED ON, AND COVERED BY CMS APPENDICES Content General Information ................................................................................................................................................................................................................................ 2 Species in Appendix I ............................................................................................................................................................................................................................... 3 Mammalia ............................................................................................................................................................................................................................................ 4 Aves ...................................................................................................................................................................................................................................................... 7 Reptilia ............................................................................................................................................................................................................................................... 12 Pisces .................................................................................................................................................................................................................................................
    [Show full text]
  • Green Sandpiper
    Green Sandpiper The Green Sandpiper (Tringa ochropus) is a small wader of the Old World. The genus name Tringa is the New Latin name given to the Green Sandpiper by Aldrovandus in 1599 based on Ancient Greek trungas, a thrush-sized, white- rumped, tail-bobbing wading bird mentioned by Aristotle. The specific ochropus is from Ancient Greek okhros, "ochre", and pous, "foot". The Green Sandpiper represents an ancient lineage of the genus Tringa and its only close living relative is the Solitary Sandpiper (T. solitaria). They both have brown wings with little light dots and a delicate but contrasting neck and chest pattern. In addition, both species nest in trees, unlike most other scolopacids. Given its basal position in Tringa, it is fairly unsurprising that suspected cases of hybridisation between this species and the Common Sandpiper (A. hypoleucos) of the sister genus Actitis have been reported. This species is a somewhat plump wader with a dark greenish-brown back and wings, greyish head and breast and otherwise white underparts. The back is spotted white to varying extents, being maximal in the breeding adult, and less in winter and young birds. The legs and short bill are both dark green. It is conspicuous and characteristically patterned in flight, with the wings dark above and below and a brilliant white rump. The latter feature reliably distinguishes it from the slightly smaller but otherwise very similar Solitary Sandpiper (T. solitaria) of North America. It breeds across subarctic Europe and Asia and is a migratory bird, wintering in southern Europe, the Indian Subcontinent, Southeast Asia, and tropical Africa.
    [Show full text]
  • Marsh Sandpiper April 1972, Probably on Migration Northwards When Ringed
    412 Scolopacidae: turnstones, sandpipers, stints, snipe and curlews of a bird ringed at Lake Nakuru (0°S 36°E), Kenya, on 15 Marsh Sandpiper April 1972, probably on migration northwards when ringed. Moerasruiter Interspecific relationships: It occurs widely alongside the two other ‘inland’ congeneric species, Greenshank and Tringa stagnatilis Wood Sandpiper T. glareola as well as the Ruff Philomachus pugnax. The Marsh Sandpiper breeds mainly in marshes on the Eur- Historical distribution and conservation: There is no asian steppes, extending into the southern parts of the boreal evidence of a change in distribution in southern Africa. How- zone, from the River Volga to Lake Baikal (Hayman et al. ever, the breeding distribution of the Marsh Sandpiper in 1986; Rogacheva 1992). Most migrate to Africa south of the Europe has contracted eastwards owing to the intensification Sahara or to India, with relatively few migrating to south- of agriculture and associated wetland drainage. eastern Asia or to Australia. The main concentration in south- ern Africa was in the section of the highveld plateau with L.G. Underhill many pans (26–28°S, 25–31°E). Other areas with high report- ing rates were the Okavango Delta, the lowveld of the east- ern Transvaal, eastern Swaziland and adjacent KwaZulu- Recorded in 1048 grid cells, 23.1% Natal, and the coastal region of the southern and southwestern Total number of records: 7178 Cape Province. Mean reporting rate for range: 7.6% Population sizes, both on the breeding and nonbreeding grounds, are poorly known (Rose & Scott 1994). Summers et al. (1987a) estimated 1000 birds in coastal southern Africa, but a larger number occurs at wetlands in the interior.
    [Show full text]
  • The Birds of New York State
    __ Common Goldeneye RAILS, GALLINULES, __ Baird's Sandpiper __ Black-tailed Gull __ Black-capped Petrel Birds of __ Barrow's Goldeneye AND COOTS __ Little Stint __ Common Gull __ Fea's Petrel __ Smew __ Least Sandpiper __ Short-billed Gull __ Cory's Shearwater New York State __ Clapper Rail __ Hooded Merganser __ White-rumped __ Ring-billed Gull __ Sooty Shearwater __ King Rail © New York State __ Common Merganser __ Virginia Rail Sandpiper __ Western Gull __ Great Shearwater Ornithological __ Red-breasted __ Corn Crake __ Buff-breasted Sandpiper __ California Gull __ Manx Shearwater Association Merganser __ Sora __ Pectoral Sandpiper __ Herring Gull __ Audubon's Shearwater Ruddy Duck __ Semipalmated __ __ Iceland Gull __ Common Gallinule STORKS Sandpiper www.nybirds.org GALLINACEOUS BIRDS __ American Coot __ Lesser Black-backed __ Wood Stork __ Northern Bobwhite __ Purple Gallinule __ Western Sandpiper Gull FRIGATEBIRDS DUCKS, GEESE, SWANS __ Wild Turkey __ Azure Gallinule __ Short-billed Dowitcher __ Slaty-backed Gull __ Magnificent Frigatebird __ Long-billed Dowitcher __ Glaucous Gull __ Black-bellied Whistling- __ Ruffed Grouse __ Yellow Rail BOOBIES AND GANNETS __ American Woodcock Duck __ Spruce Grouse __ Black Rail __ Great Black-backed Gull __ Brown Booby __ Wilson's Snipe __ Fulvous Whistling-Duck __ Willow Ptarmigan CRANES __ Sooty Tern __ Northern Gannet __ Greater Prairie-Chicken __ Spotted Sandpiper __ Bridled Tern __ Snow Goose __ Sandhill Crane ANHINGAS __ Solitary Sandpiper __ Least Tern __ Ross’s Goose __ Gray Partridge
    [Show full text]
  • Vertebrate Diversity Benefiting from Carrion Provided by Pumas And
    Biological Conservation 215 (2017) 123–131 Contents lists available at ScienceDirect Biological Conservation journal homepage: www.elsevier.com/locate/biocon Short communication Vertebrate diversity benefiting from carrion provided by pumas and other subordinate, apex felids MARK L. Mark Elbroch⁎, Connor O'Malley, Michelle Peziol, Howard B. Quigley Panthera, 8 West 40th Street, 18th Floor, New York, NY 10018, USA ARTICLE INFO ABSTRACT Keywords: Carrion promotes biodiversity and ecosystem stability, and large carnivores provide this resource throughout the Biodiversity year. In particular, apex felids subordinate to other carnivores contribute more carrion to ecological commu- Carnivores nities than other predators. We measured vertebrate scavenger diversity at puma (Puma concolor) kills in the Food webs Greater Yellowstone Ecosystem, and utilized a model-comparison approach to determine what variables influ- Scavenging enced scavenger diversity (Shannon's H) at carcasses. We documented the highest vertebrate scavenger diversity of any study to date (39 birds and mammals). Scavengers represented 10.9% of local birds and 28.3% of local mammals, emphasizing the diversity of food-web vectors supported by pumas, and the positive contributions of pumas and potentially other subordinate, apex felids to ecological stability. Scavenger diversity at carcasses was most influenced by the length of time the carcass was sampled, and the biological variables, temperature and prey weight. Nevertheless, diversity was relatively consistent across carcasses. We also identified six additional stalk- and-ambush carnivores weighing > 20 kg, that feed on prey larger than themselves, and are subordinate to other predators. Together with pumas, these seven felids may provide distinctive ecological functions through their disproportionate production of carrion and subsequent contributions to biodiversity.
    [Show full text]
  • British Birds |
    VOL. LU JULY No. 7 1959 BRITISH BIRDS WADER MIGRATION IN NORTH AMERICA AND ITS RELATION TO TRANSATLANTIC CROSSINGS By I. C. T. NISBET IT IS NOW generally accepted that the American waders which occur each autumn in western Europe have crossed the Atlantic unaided, in many (if not most) cases without stopping on the way. Yet we are far from being able to answer all the questions which are posed by these remarkable long-distance flights. Why, for example, do some species cross the Atlantic much more frequently than others? Why are a few birds recorded each year, and not many more, or many less? What factors determine the dates on which they cross? Why are most of the occurrences in the autumn? Why, despite the great advantage given to them by the prevail­ ing winds, are American waders only a little more numerous in Europe than European waders in North America? To dismiss the birds as "accidental vagrants", or to relate their occurrence to weather patterns, as have been attempted in the past, may answer some of these questions, but render the others still more acute. One fruitful approach to these problems is to compare the frequency of the various species in Europe with their abundance, migratory behaviour and ecology in North America. If the likelihood of occurrence in Europe should prove to be correlated with some particular type of migration pattern in North America this would offer an important clue as to the causes of trans­ atlantic vagrancy. In this paper some aspects of wader migration in North America will be discussed from this viewpoint.
    [Show full text]