LesserKestrel_breeding_parameters_whole_dataset

Breeding parameters of Lesser Kestrel (Falco naumanni) in Castro Verde, Portugal, between 2003-2014

LessserKestrel_breeding_parameters_ringed_birds_dataset

Breeding parameters, age and recapture data of Lesser Kestrels (Falco naumanni) ringed between 2003 and 2014 at Castro Verde, Portuga

LesserKestrel_female_mass_wing

Weight and wing length of female Lesser Kestrels (Falco naumanni) captured during the incubation period between 2003 and 2014 in Castro Verde, Portugal

Carbon and nitrogen stable isotopic ratios of Dunlin (Calidris alpina)

Carbon and nitrogen stable isotopic signatures of dunlin (Calidris alpina) toenails, red blood cells (RBC) and plasma collected at the Tagus estuary (Portugal) and Banc d'Arguin (Mauritania) during the winters of 2012-2013 and 2013-2014, and at the Tagus estuary (Portugal) during spring migration of 2013 and 2014. Wintering origins of dunlins sampled during spring migration at the Tagus estuary, as determined by a discriminant analysis based on isotopic signatures of toenails (see Catry et al. 2016, 10.1016/j.baae.2015.10.005), are also included. Birds identified as originating from wintering areas outside Mauritania and Portugal (e.g. Morocco) are included in the dataset but were excluded from further analyses, as well as two birds with low classification scores

grasshopper_molecricket_pellets

Mean number of grasshoppers (Acrididae and Tetigonidae) and mole crickets (Gryllotalpidae) found in Lesser Kestrel (Falco naumanni) pellets collected in several colonies between 2007-2008 and 2012-2014

Dunlin (Calidris alpina) counts

Total number of dunlins (Calidris alpina) counted in high-tide roost regular counts at the Tagus estuary (Portugal) during spring migration

Mean energy intake rates achieved by foraging dunlins in winter and spring (J/min).

<p>Relative contribution of different prey is shown, as percentage. Error bars represent the SE for pooled prey.</p

Densities of <i>Scrobicularia plana</i>, <i>Hediste diversicolor</i> and <i>Hydrobia ulvae</i> and sex-specific prey selection (α) by black-tailed godwits at the five study sites of the Tagus estuary.

<p>Invertebrate density is expressed as mean ± SE, in ind.m⁻². Prey selection was estimated using the Manly's preference index (α). Values of α in bold indicate positive selection of a specific prey (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0033811#s2" target="_blank">methods</a>).</p

Microhabitat use by male and female godwits in the Tagus estuary when feeding upon <i>Scrobicularia plana, Hediste diversicolor</i> and <i>Hydrobia ulvae</i>.

<p>Microhabitat was classified into three categories according to the water level of foraging areas: (1) no water – birds feeding on exposed mudflats or oyster beds, (2) water below knee and (3) water above knee. Black dots in the ternary diagrams represent the proportions of microhabitat use calculated for each individual (in each study-season). Dot size (area) is proportional to the number of individual observations with the same coordinates. Average values of microhabitat use for each prey type and sex-class are represented by red dots; red-lines guide the readings in ternary graphics. Arrows outside the diagram indicate the increasing use of each specific microhabitat class.</p

Generalized linear mixed models relating size of prey consumed by black-tailed godwits with prey density, culmen length, sex and date.

<p>The table presents comparisons of increasingly simpler nested models, using likelihood-ratio tests (L.ratio) and coefficients of best significant models, fitted by Restricted Maximum Likelihood. Bird identity was treated as a random factor and “*” stands for interaction between variables. The best model is presented in italics and the estimation of the coefficients (estimate) is given with standard errors (SE). AIC values corrected for finite sample sizes (AICc) are presented for comparative purposes only (differences in AICc values lower than 2 between candidate models were not valorised; <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0033811#pone.0033811-Symonds1" target="_blank">[59]</a>). t-tests and the respective p-values are used to test the significance of each tern of the final model.</p