| impacts of man-made landscape features on numbers of estuarine waterbirds at low tide. | the potential impact of human disturbance on wintering waterbirds using intertidal mudflats was considered by relating their numbers to the presence of nearby footpaths, roads, railroads, and towns. data were obtained for six english estuaries from the wetland bird survey low tide count scheme. counts were undertaken monthly from november to february, and data were available for an average of 2.8 years per estuary for the period 1992-1993 to 1999-2000. count sections and the positions of man-mad ... | 2002 | 12402099 |
| declines in migrant shorebird populations from a winter-quarter perspective. | many long-distance migrating shorebird (i.e., sandpipers, plovers, flamingos, oystercatchers) populations are declining. although regular shorebird monitoring programs exist worldwide, most estimates of shorebird population trends and sizes are poor or nonexistent. we built a state-space model to estimate shorebird population trends. compared with more commonly used methods of trend estimation, state-space models are more mechanistic, allow for the separation of observation and state process, an ... | 2015 | 25858334 |
| detection of two arctic birds in greenland and an endangered bird in korea using rgb and thermal cameras with an unmanned aerial vehicle (uav). | unmanned aerial vehicles (uavs), so-called 'drones', have been widely used to monitor wild animals. here, we tested a uav with red, green, and blue (rgb) and thermal cameras to detect free-living birds in a high arctic region in north greenland and in a restricted area in the republic of korea. small flocks of molting pink-footed geese (anser brachyrhynchus) near sea ice and incubating common ringed plovers (charadrius hiaticula) in the arctic environment were chosen for the rgb and thermal imag ... | 2019 | 31483842 |
| the migration pattern of a monogamous shorebird challenges existing hypotheses explaining the evolution of differential migration. | differential migration by sex, where one sex migrates further than the other, occurs in many bird species. how this pattern evolves is however little understood. the first aim of this study was to investigate the extent of differential migration in the common ringed plover charadrius hiaticula, breeding in southeast sweden, and test three main hypotheses (the social dominance, body size and arrival time hypothesis) regarding the evolution of differential migration. geolocators were used to deriv ... | 2020 | 31836506 |