datafile 3

Summary of calculated costs of wintering and flying to and from their different wintering sites, separated per se

datafile 1

Basic datafile, with counts per sex and area, including the summary of benthic biomas

Bill lengths of first and consequent catches

Bill lengths of bar-tailed godwits (Limosa lapponica) at time of first capture and bill lenghts of birds recaptured (> 1 yr)

Mean bill length of bar-tailed godwits (Limosa lapponica)

Mean bill length of bar-tailed godwits (Limosa lapponica) captured and/or resighted in the Dutch Wadden Sea and the Wash (UK)

Percentage of energy (AFDM) in diet

Percentage of energy content (AFDM g) in diet of bar-tailed godwits (Limosa lapponica) per month based on observations and dropping analysis. Dataset includes mean burying depth of lugworms (cm), mean bill length (mm) of Dutch Wadden Sea birds only and the mean PEIR (predicted energy intake rate)

Predicted Energy Intake Rate (PEIR)

Prey burying depth per month and year, energy and density per m2, the predicted a (exp.a; area of discovery) and predicted handling time (Th) and the intake rate (PEIR)

Field_data_I

This file provides the field data of observed female bar-tailed godwits foraging on lugworms. Data includes prey size, handling time, energy (g AFDM), total foraging time, time spent vigilance, preening time, plot nr, searching time (Ts), intake rate per second and prey density

Ivlev_density

Data file containing the Ivlev index, per grouped food densit

handling

The data file from the experimental set up

Search_time

Datafile containing search time (Ts), with a similar set up as the handling data fil