As field determinations take much effort, it would be useful to be able to predict easily the
coefficients describing the functional response of free-living predators, the function relating …

The nighttime sky is increasingly illuminated by artificial light sources. Although this ecological
light pollution is damaging ecosystems throughout the world, the topic has received …

… 711 BJ Ens et al. tidal cycle in flight to achieve the mean food delivery of residents. On only
five out of 55 tides did the food delivery of a focal leapfrog parent exceed the average food …

… Sporadic visits to the island in winterindicate that the pair bonds are not maintained during
that time ofyear (BJ Ens & JB Hulscher, unpublished data). Territorial behaviourmaybe …

Local biodiversity trends over time are likely to be decoupled from global trends, as local
processes may compensate or counteract global change. We analyze 161 long-term biological …

Birds migrating between widely separated wintering and breeding grounds may choose
among a number of potential stopover sites by using different itineraries. Our aim is to predict …

Mass mortality of common eiders (Somateria mollissima) was observed in winter 1999/2000
in the Dutch Wadden Sea. Approximately 21,000 common eiders died. Dissected birds were …

Climate change encompasses changes in both the means and the extremes of climatic
variables, but the population consequences of the latter are intrinsically difficult to study. 2. We …

… Hedwig Ens and Jeroen Onrust provided assistance with the field work. Edwin Baaij
provided assistance with the tracking system. We thank Yaiza Dronkers Londono and Merijn de …

We carried out two experiments to quantify effects of human disturbance on foraging and
parental care in European oystercatchers (Haematopus ostralegus). In experiment 1, pairs …