Small home ranges and high site fidelity in red knots (Calidris c. canutus) wintering on the Banc d’Arguin, Mauritania

  title={Small home ranges and high site fidelity in red knots (Calidris c. canutus) wintering on the Banc d’Arguin, Mauritania},
  author={Jutta Leyrer and Bernard Spaans and Mohamed Lamine Camara and Theunis Piersma},
  journal={Journal of Ornithology},
Using automated and manual radio-telemetry and resightings of individual colour-ringed birds, we assessed the daily use of space of red knots Calidris canutus canutus at a tropical wintering area along the Sahara coast, the Banc d’Arguin in Mauritania. Confirming earlier suggestions, we found that birds were very faithful to their roosts and that the daily foraging range was small; in the course of several winter months birds used an area of only 2–16 km2 of intertidal area. We found no… 
Abstract Shorebird roosts are often considered traditional, on the basis of predictable occupancy by large numbers of birds over long periods. However, fidelity of individuals to roosts at fine
Red Knot (Calidris canutus rufa) site fidelity at Península Valdés, Argentina
ABSTRACT Red Knots (Calidris canutus rufa) are long-distance migratory shorebirds that fly from the Arctic to the southern tip of South America. They stop over in a few places with high
Northward migration of Afro-Siberian Knots Calidris canutus canutus : high variability in Red Knot numbers visiting staging sites on the French Atlantic coast, 1979–2009
The Afro–Siberian Red Knot subspecies, Calidris canutus canutus, winters mainly on Banc d’Arguin, Mauritania, West Africa. An International Wader Study Group project carried out in 1979 suggested
Within‐year movements and site fidelity of Purple Sandpipers during the nonbreeding season
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Small-scale demographic structure suggests preemptive behavior in a flocking shorebird
Though rare, between winter season movements were 3 times more frequent from B to A than vice versa, indicating that knots can assess the differences in site quality: birds behaved as if they were "ideal".
Differential mortality of wintering shorebirds on the Banc d'Arguin, Mauritania, due to predation by large falcons
It is suggested that juvenile Red Knots are 10 times as likely to be killed by falcons because they use riskier habitats, i.e. early and late tide foraging areas closer to shores where surprise attacks are both more common and more successful.
Mortality within the annual cycle: seasonal survival patterns in Afro-Siberian Red Knots Calidris canutus canutus
AbstractEstimates of seasonal mortality for long-distance migrant birds are extremely challenging to collect and consequently reports are scarce. Determining when and where mortality occurs within
Intra- and interannual regional fidelity of Semipalmated Sandpipers (Calidris pusilla) during migratory stopover in the upper Bay of Fundy, Canada
The Bay of Fundy, Canada is a critical migratory stopover for Semipalmated Sandpipers (Calidris pusilla) during fall migration. Recent ecological changes combined with range-wide population declines
High variation in roost use by Dunlin wintering in California: Implications for habitat limitation
Effective shorebird conservation requires a greater understanding of use and availability of high-tide roosts in coastal non-breeding areas. In this paper, we explore 1) variation in use of roosts;


Length of stopover, fuel storage and a sex-bias in the occurrence of red knots Calidris c. canutus and C-c. islandica in the Wadden Sea during southward migration
During southward migration the Wadden Sea is the meeting place of Red Knots Calidris canutus of two subspecies that breed in either western Siberia or north Greenland and north-east Canada, but the details of their co-occurrence have not been described.
High-tide habitat choice: insights from modelling roost selection by shorebirds around a tropical bay
Abstract By radio-tracking and recording the movements of flocks, the distribution of feeding Red Knots (Calidris canutus rufa) was studied day and night at a migration stopover site near San Antonio
Differences in the diurnal and nocturnal use of intertidal feeding grounds by Redshank Tringa totanus
Comparison with previous studies suggests that the importance of sites predominantly used at night and the total extent of the areas used by waders may be underestimated by studies that rely on daytime surveys alone.
Annual and seasonal-variation in the food-supply harvestable by knot Calidris-canutus staging in the Wadden Sea in late summer
The biomass of the macrobenthic animals living in intertidal flats of the Wadden Sea varies annually and seasonally. However, the variation in prey biomass harvestable by wading birds such as knot
Fidelity of overwintering shorebirds to roosts on the Moray basin, Scotland: Implications for predicting impacts of habitat loss
It is proposed that the impact of a change in roost availability may be minimised by replacement roosts, possibly due to differences in prey availability on the two estuaries.
Variability in Basal Metabolic Rate of a Long-Distance Migrant Shorebird (Red Knot, Calidris canutus) Reflects Shifts in Organ Sizes
It is argued that red knots have metabolic machinery that is able to adjust continuously, depending on the ecological conditions and food types encountered in the course of the year, and variation in (functional components of) lean mass is the vehicle for seasonal adjustments in metabolic physiology to variable demand levels.
Do body condition and plumage during fuelling predict northwards departure dates of Great Knots Calidris tenuirostris from north‐west Australia?
It is often assumed that strong selection pressures give rise to trade-offs between body condition and time in long-distance migrating birds. Birds that are 'behind schedule' in fuel deposition or