Additional file 1 of Developing and validating a nestling photographic aging guide for cavity-nesting birds: an example with the European Bee-eater (Merops apiaster)

Additional file 1: Table S1. Photographic guide of bee-eater nestlings from hatch to fledging. Table S2. Table illustrating the confusion matrix. Table S3. Confusion matrix comparing predicted classes by the observers in the test to the actual classes. Table S4. Ranking of candidate models explaining the ability to predict bee-eater nestling’s age. Table S5. Pairwise comparisons between trials. Figure S1. Variation on the mean (± SE) percentage of correctly assigned estimates for age class, observer and trial.