Some Characteristics of Fall Migration of Female Woodcock

Coon, R.A.; Caldwell, Paul D.; Storm, Gerald L.

doi:10.2307/3800159

Cited by 14 publications

(11 citation statements)

References 4 publications

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“…Native birds exhibit Zugunruhe shortly (approx. 1-2 weeks) before initiating migration, as Coon et al (1976) found in the Eastern Region and Krementz et al (1994) found for woodcock shortly before spring migration. In both cases, radiomarked woodcock moved away from sites used before migration and then remained at new temporary sites until they migrated.…”

Section: Discussionsupporting

confidence: 65%

American Woodcock Fall Migration Using Central Region Band‐Recovery and Wing‐Collection Survey Data

Myatt¹,

Krementz²

2007

J Wildl Manag

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Band‐recovery and wing‐collection survey data have the potential to provide information on American woodcock (Scolopax minor) fall migration ecology in the Central Region of the United States, yet researchers have not recently analyzed these extensive data sets. We analyzed all direct recoveries of woodcock banded in Michigan, Minnesota, and Wisconsin, USA, as well as wing‐collection survey data, to determine the progression of fall migration, the migration direction, and the final destination of woodcock migrating from these states. We did not observe migration initiation based on band recoveries until late October and early November, with most migration occurring during November. Wing‐receipt data showed a similar trend, with most change in mean receipt latitude occurring from 1 November to 5 December. During November, wing receipts were spread through the entire Central Region. By 15–31 December, 92% (n = 26) of band recoveries were on the wintering grounds (south of latitude 33°N). Most banded woodcock from Michigan, Minnesota, and Wisconsin wintered in Louisiana, USA. Woodcock banded in these states will be exposed to harvest for most of the hunting season because they remain in these states through November. If the population status of local birds is a concern, managers should consider this migration pattern when setting season dates.

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Section: Discussionsupporting

confidence: 65%

American Woodcock Fall Migration Using Central Region Band‐Recovery and Wing‐Collection Survey Data

Myatt¹,

Krementz²

2007

J Wildl Manag

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“…A synchronized progression of autumn migration based on breeding latitude supports this hypothesis (Myatt and Krementz ), whereby departure from the Great Lakes region is evidently cued by changes in photoperiod (Meunier et al ). Departure dates of radio‐marked woodcock in Pennsylvania are between 18 November and 8 December (Coon et al ), Maine departures were in the first week of November (Sepik and Derleth ), and most departures from Minnesota, Wisconsin, and Michigan occurred in October and November (Meunier et al ). Myatt and Krementz () suggested that previous anecdotal evidence of early departures from the Great Lakes region was most likely the result of observations of Canadian birds migrating through the Great Lakes region in October (leaping over later migrating individuals).…”

Section: Discussionmentioning

confidence: 99%

American woodcock migratory connectivity as indicated by hydrogen isotopes

et al. 2016

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To identify factors contributing to the long‐term decline of American woodcock, a holistic understanding of range‐wide population connectivity throughout the annual cycle is needed. We used band recovery data and isotopic composition of primary (P1) and secondary (S13) feathers to estimate population sources and connectivity among natal, early fall, and winter ranges of hunter‐harvested juvenile American woodcock. We used P1 feathers from known‐origin pre‐fledged woodcock (n = 43) to create a hydrogen δ2Hf isoscape by regressing δ2Hf against expected growing‐season precipitation (δ2Hp). Modeled δ2Hp values explained 79% of the variance in P1 δ2Hf values, indicating good model fit for estimating woodcock natal origins. However, a poor relationship (r2 = 0.23) between known‐origin, S13 δ2Hf values, and expected δ2Hp values precluded assignment of early fall origins. We applied the δ2Hf isoscape to assign natal origins using P1 feathers from 494 hunter‐harvested juvenile woodcock in the United States and Canada during 2010–2011 and 2011–2012 hunting seasons. Overall, 64% of all woodcock origins were assigned to the northernmost (>44°N) portion of both the Central and Eastern Management Regions. In the Eastern Region, assignments were more uniformly distributed along the Atlantic coast, whereas in the Central Region, most woodcock were assigned to origins within and north of the Great Lakes region. We compared our origin assignments to spatial coverage of the annual American woodcock Singing Ground Survey (SGS) and evaluated whether the survey effectively encompasses the entire breeding range. When we removed the inadequately surveyed Softwood shield Bird Conservation Region (BCR) from the northern portion of the SGS area, only 48% of juvenile woodcock originated in areas currently surveyed by the SGS. Of the individuals assigned to the northernmost portions of the breeding range, several were harvested in the southern extent of the wintering range. Based upon this latitudinal winter stratification, we examined whether woodcock employed a leapfrog migration strategy. Using δ2Hf values and band‐recovery data, we found some support for this migration strategy hypothesis but not as a singular explanation. The large harvest derivation of individuals from the northernmost portions of the breeding range, and the difference in breeding distributions within each Management Region should be considered in future range‐wide conservation and harvest management planning for American woodcock. © 2016 The Wildlife Society.

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“…In 1976, 16 pen-reared wild Mallard ducklings were each equipped with a backmounted radio package weighing about 5 g and similar to that described by Sayre et al (198 1). For ducklings older than two weeks, glue was supplemented with a loop harness of nylon line that extended from each side of the transmitter, around the wings, and was tied on the duckling' s abdomen in front of the legs (Coon et al 1976). These ducklings were released in wetlands during June and July in order to identify predators and to evaluate the effects of predation on duckling survival.…”

Section: Study Area and Methodsmentioning

confidence: 99%