800 Quinard Court

Ambler, PA, United States

800 Quinard Court

Ambler, PA, United States
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Bentzen R.,Wildlife Conservation Society | Dondua A.,Saint Petersburg State Polytechnic University | Porter R.,800 Quinard Court | Robards M.,Wildlife Conservation Society | Solovyeva D.,Russian Academy of Sciences
Wader Study | Year: 2016

Many shorebird populations have declined, and mapping habitat use during the non-breeding period and determining timing of use have become increasingly urgent for conservation. This study provides the first detailed location information on the complete migration cycle for the subspecies of Dunlin Calidris alpina sakhalina breeding in Chukotka, Russia. Geolocators were deployed and recovered on breeding Dunlin at Chaun River Delta (n = 12 of 35 deployed) and Belyaka Spit, Russia (n = 11 of 25 deployed), between 2011 and 2014. Dunlin migrated south through the Sea of Okhotsk to the Korean Peninsula and China. Upon reaching the Yellow Sea, ten individuals stopped for 39–74 (mean ± SE; 54 ± 4) days before moving on to wintering grounds in China, and two remained in the area throughout the winter. Tagged Dunlin wintered in China, South Korea, and Vietnam, primarily between the northwest Yellow Sea and the Gulf of Tonkin in China. Nine individuals moved from their wintering grounds north to areas around the Yellow Sea between 10 March and 3 April (mean: 23 March), where they spent 23–73 (53 ± 4) days before continuing to the Arctic breeding grounds with only short stopovers (<10 days). Dunlin may be site-faithful to their winter and stopover areas; geolocators on three individuals recorded >1 year of data and indicated very similar migratory routes and use of winter areas between years. At the scale of this study, there was no segregation of Dunlin that bred in the Chaun River Delta and at Belyaka Spit during the non-breeding season. Dunlin breeding in Chukotka, Russia, are particularly reliant on coastal habitat around the Yellow Sea, as well as the Fujian coast and Yangtze River floodplain in China for wintering habitat. The Yellow Sea is an important stopover site during both southern and northern migrations, as are coastal areas around northern Sakhalin Island and the Sea of Okhotsk. © 2016, International Wader Study Group. All rights reserved.


Johnson O.W.,Montana State University | Tomkovich P.S.,Moscow State University | Porter R.R.,800 Quinard Court | Loktionov E.Y.,Moscow State Technical University | Goodwill R.H.,Brigham Young University - Hawaii
Wader Study | Year: 2017

For the first time, we have tracked the annual migrations of Pacific Golden- Plovers nesting in northern Russia. We used geolocators to determine the timing and migration routes of four male plovers trapped at one site in SE Chukotka. Before leaving the north in autumn, each bird moved from nesting grounds and made one or two pre-migratory stopovers of 13–22 days (presumably on coastal tundra) in either Russia (Kamchatka and Khabarovsk Krai) or the USA (St. Matthew Island and the Pribilof Islands). After departing these sites, three birds traveled southward via eastern Asia and Japan to non-breeding grounds in the Philippine Islands, and one bird followed an oceanic route to Majuro Atoll in the Marshall Islands. All of these linkages were previously unknown. Two birds made nonstop flights of 4–6 days directly to non-breeding grounds, whereas two made additional stopovers en route (16 d in Japan and 18 d in China, respectively). In spring, return migrations from the Philippines variously included stopovers in South Korea, Taiwan, and China; the bird migrating from Majuro stopped-over only in Japan. Mean minimum flight speed on all legs in both autumn (after premigratory stopovers) and spring was 53 kph. On average, plovers spent 24 days at stopovers during the autumn journey, and 36 days at stopovers during the spring passage. Stopover sites and also non-breeding grounds probably included agricultural lands, most likely rice fields. While the migrations of these four birds shed light on migratory connectivity of Pacific Golden-Plovers nesting in Chukotka, additional studies are needed to: (1) further explore the non-breeding range of plovers breeding there and elsewhere in northern Russia, (2) better define important stopover sites including pre-migratory sites in the north, and (3) more fully understand the relationships between plovers and trophic resources associated with agriculture. © 2017, International Wader Study Group. All rights reserved.


Loktionov E.Y.,Moscow State Technical University | Tomkovich P.S.,Moscow State University | Porter R.R.,800 Quinard Court
Wader Study | Year: 2015

This is the first study of the breeding biology of Red Knots of the subspecies Calidris canutus rogersi in the Chukotka region, Far Eastern Russia. Direct behavioral observations and geolocator data of two Red Knots were compared to study the breeding phenology, incubation period and incubation bouts in sub-Arctic Chukotka, a region with twilight around midnight. The incubation period was 23 days after the second or third egg was laid, including about half a day in the nest with the hatched chicks. This corresponds with 21–21.5 days of incubation estimated by the traditional way (interval for the last egg of a clutch from laying to hatching). We suggest that males incubate longer than females. Geolocator data of brooding males after their chicks left the nest differed from those of females that do not attend chicks. Geolocator data might thus indicate the sex of Red Knots. For both males, the lengths of their respective incubation bouts and offduty periods did not significantly differ. Both bout lengths increased in the second half of the incubation period. Brooding time of chicks seems to gradually decrease during the summer, but it was not possible to determine when brooding ceased or when the chicks became independent. Birds started their southward migration 28–28.5 days after families left their nests. This is longer than estimated by direct local field observations and by another geolocator study of Red Knots. © 2015, International Wader Study Group. All rights reserved.


Burger J.,Rutgers University | Niles L.J.,Conserve Wildlife | Porter R.R.,800 Quinard Court | Dey A.D.,Endangered and Nongame Program | And 2 more authors.
Renewable Energy | Year: 2012

With a worldwide increase in energy needs, many countries are increasing their development of renewable sources, such as wind and solar. We examined possible risk to a migrating and wintering shorebird (red knots Calidris canutus rufa) along the Atlantic Coast of the United States by developing a conceptual model of assessment endpoints, stressors, exposure, and effects characterization, and testing the applicability of knots fitted with geolocators to provide data for salient aspects of exposure and risk for coastal and offshore development. Birds were fitted with geolocators in Delaware Bay (New Jersey) and Monomoy Refuge (Massachusetts) in 2009, and recaptured at the same locations in 2010. The knots recaptured in Delaware Bay were long-distance migrants that spent less time along the Atlantic Coast (<7%, N=3), while the knots recaptured in Monomoy spent over half of the year migrating, at stopovers, and wintering along the Atlantic Coast (>60%, N=6 with one-year cycle). The continuous record of geolocators provides useful data for a risk evaluation about: (1) high use areas for this shorebird (2) migration, staging and wintering areas, (3) possible foraging times while at stopovers, (4) synchrony of arrival and departure times, (5) weight or condition following a yearly cycle, and (6) direction of movements over the Atlantic Outer Continental Shelf (AOCS), a potential risk consideration with respect to offshore wind development. All knots crossed the AOCS at least twice during long-distance flights, and more often on shorter flights. The knots captured at Monomoy spent over 60% of their cycle while migrating, at stopovers, and while wintering along the Atlantic coast, suggesting the importance of this region to conservation of knots. © 2011 Elsevier Ltd.


Burger J.,Rutgers University | Niles L.J.,Conserve Wildlife | Porter R.R.,800 Quinard Court | Dey A.D.,Endangered and Nongame Program
Wader Study Group Bulletin | Year: 2012

Shorebirds that nest at low densities in the Arctic are difficult to study. Information on breeding phenology, incubation period, and incubation outcomes can aid an understanding of population dynamics, particularly for species whose populations are declining. We describe a technique for using data from light-archival geolocators placed on Red Knots Calidris canutus rufa to determine information about breeding, and report on the proportion of knots that reached Arctic breeding grounds, attempted incubation, and appeared to incubate to full term, as well as total time spent in the Arctic. We captured 19 knots that were fitted with geolocators in New Jersey, Massachusetts, Florida, Texas, and S Argentina, and reached Arctic breeding areas. The median arrival date in the Arctic was 10 June, the median departure date was 22 July, and the mean time in the Arctic was 44 ±2.3 days (range 28-65 days). Because of 24 hr sunlight in the Arctic summer, prolonged periods of a mainly dark signal indicate that the geolocator was not exposed to light, and we inferred that the bird was incubating. On the basis of this assumption, we found that 85% initiated incubation (N = 20), 65 % (N = 17) incubated for 18-24 days, and one incubated for 30 days. Geolocator output showed that knots rarely entered salt water while in the Arctic. All the knots for which we obtained data reached their Arctic breeding grounds and a high proportion incubated nests.


Burger J.,Rutgers University | Niles L.J.,Conserve Wildlife | Porter R.R.,800 Quinard Court | Dey A.D.,Endangered and Nongame Program | And 2 more authors.
Condor | Year: 2012

Surveys and banding records of Calidris canutus rufa indicate that Red Knots migrate mainly north and south through Massachusetts, Delaware Bay, and Virginia, and winter in Florida and South America. We fitted 40 adult Red Knots with geolocators at Monomoy National Wildlife Refuge, Massachusetts, during fall migration (2009), and in this paper report on the locations of migration and wintering along the Atlantic coast of the United States of eight recaptured knots. The knots' migration patterns varied: four birds wintered along the U.S. Atlantic coast, and the rest went to the Caribbean islands or the northern edge of South America. Knots spent 58 to 75 days in Monomoy Refuge before migrating south in November. Seven of the eight stopped along the U.S. Atlantic coast for relatively long periods. For the six with complete yearly cycles, the total time spent along the Atlantic coast averaged 218 days (range 121-269 days). All eight knots crossed the Atlantic outer continental shelf from two to six times. Areas of use were Monomoy, Long Island, New Jersey, Maryland, the Outer Banks of North Carolina, South Carolina, and Florida. These data indicate that Red Knots moving through Massachusetts in the fall had variable migration patterns, spent considerable periods of their life cycle along the Atlantic coast, and each knot followed a separate and distinct path, which suggests that knots can be at risk along the Atlantic coast for a substantial period of their life cycle. © The Cooper Ornithological Society 2012.


Newstead D.J.,1305 N Shoreline Blvd | Niles L.J.,Conserve Wildlife Foundation of New Jersey | Porter R.R.,800 Quinard Court | Dey A.D.,Fish and Wildlife | And 2 more authors.
Wader Study Group Bulletin | Year: 2013

Red Knots Calidris canutus are commonly observed along the Texas coast during fall and spring. Although some significant winter records have been reported in Texas, it was previously unknown if birds were using Texas as a wintering area or primarily as a stopover area en route to more southerly wintering destinations. We fitted 69 Red Knots with geolocators on Mustang and Padre Islands between fall 2009 and fall 2010, and recovered eight of them between fall 2010 and spring 2012. The data showed that these knots: 1) spent nearly the entire nonbreeding phase of their annual cycle (78.4%) in the north-west Gulf of Mexico, 2) used the Mid- Continent (or Central) Flyway as a migratory route on both north and southbound migrations, 3) used stopover sites in the Northern Great Plains of the United States and Canada as well as the Nelson River Delta/Hudson Bay area, and 4) exhibited stronger consistency in timing of northbound migratory movements than in southbound movements. For the two birds for which geolocator data included consecutive years of data, one showed consistency in northbound and southbound stopover location between years, while the other showed variability in northbound, but not southbound stopover locations. A geolocator recovered from a bird that was originally captured in the year in which it hatched showed that it also oversummered in Texas. The data further highlights the critical importance of the north-west Gulf of Mexico – particularly the Laguna Madre and Padre Island – for this population of Red Knots, and the need for further investigation to discover specific wintering sites. © 2013, International Wader Study Group. All rights reserved.


Porter R.,800 Quinard Court | Smith P.A.,Environment Canada
Wader Study Group Bulletin | Year: 2013

We review the use of light-level geolocators to track long-distance migrant shorebirds and describe several techniques that an analyst can employ to obtain the best possible estimates of a bird’s location. These include: calibration using perfectly bright and clear days, longitude averaging, point clusters, habitat knowledge, the use of resightings of the birds, dealing with the different error patterns before and after the spring and fall equinoxes, weather pattern correction, the effects of artificial light, interpretation of geolocator fixes obtained during migratory flights, the use of data recorded by a geolocator’s conductivity sensor to determine flight duration and location estimation when a bird is in the Arctic using the nightshade technique. We also review the accuracy that can be expected in shorebird studies using geolocators. © 2013, International Wader Study Group. All rights reserved.


Niles L.J.,Conserve Wildlife Foundation of NJ | Burger J.,Rutgers University | Porter R.R.,800 Quinard Court | Dey A.D.,Fish and Wildlife | And 4 more authors.
Wader Study Group Bulletin | Year: 2012

Light-level geolocators were deployed on 37 Red Knots at Monomoy National Wildlife Refuge, Cape Cod, Massachusetts, United States in Sep 2009 and eight were recovered at the same place a year later. Two of the eight geolocators failed halfway through the year, but the other six provided a full year's record of the birds' locations. All eight birds carried out the whole of their large-feather molt at Monomoy, after which they moved south to wintering areas, leaving between 29 Oct and 16 Nov. Four birds wintered on the U.S. Atlantic coast between Virginia and Florida, while four wintered in the Caribbean in areas not previously identified as important for Red Knots. During northward migration all six knots with geolocators still working stopped in the vicinity of the Nelson River estuary in the south-west corner of Hudson Bay, a site not previously identified as an important stopover for Red Knots. Migration speed (defined as the speed achieved between one stopover and the next, assuming the bird travelled along the great circle route) differed significantly between flights affected by headwinds (median 47 kph), those that took place in calm conditions (60 kph) and those affected by tailwinds (72 kph). We discuss the implications of our results for the conservation of the threatened rufa Red Knot population and highlight the need to investigate some of the sites the birds visited.


Tomkovich P.S.,Moscow State University | Porter R.R.,800 Quinard Court | Loktionov E.Y.,Moscow State Technical University | Niles L.J.,Conserve Wildlife Foundation of NJ
Wader Study Group Bulletin | Year: 2013

Based on ring recoveries and observations of colour-marked individuals, we identify the non-breeding range, migration routes and staging areas used by Red Knots Calidris canutus of the subspecies rogersi from its southernmost sub-arctic breeding population in Chukotka, NE Asia. We also present the first three geolocator tracks of individual rogersi adult males. The non-breeding grounds of rogersi extend from New Zealand to NW Australia, with the majority going to the eastern part of this range (primarily New Zealand and E Australia). Three key staging areas for migrants are indicated by the geolocator data: (1) the NW Yellow Sea, (2) the western Sea of Okhotsk, north of the Amur River delta, and (3) the Gulf of Carpentaria, Australia. The Yellow Sea is extensively used during both north and south migration, whereas the other two sites are only used during south migration. The three birds with geolocators made round trips of 23,000–31,000 km. The two that went to New Zealand made direct flights of about 10,100 km from New Zealand to the NW Yellow Sea, the longest non-stop flight known for Red Knots to date. Mostly the flight paths taken by the three birds between stopovers were not further from the great circle route that the ca. 200 km margin of error associated with geolocator fixes. The only exception was that in most cases they appeared to fly south of the Kamchatka Peninsula when migrating between their breeding grounds and the Yellow Sea (four of five flight paths passed south around Kamchatka). © 2013, International Wader Study Group. All rights reserved.

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