Data from: Startling ravens (Corvus corax) at foraging: differences in anti-predator behaviour can be explained by age rather than personality

Background: This study investigated boldness-shyness as a personality
trait in free-flying ravens. Through the utilisation of audio playbacks of
aerial or ground-dwelling predators, designed to elicit a startle response
in the birds, we sought to elucidate the influence of between-individual
behavioural differences, stimulus type, age and sex on ravens’ startle
responses. Analysis: We analysed nine boldness-shyness related behaviour
variables for (1) consistent between-individual differences by using the R
functions ICC and rptr, (2) for influences of stimulus type, age and sex
through linear mixed models (LMMs) and bootstrap-coupled estimation plots
and (3) possiblem habituation effects by calculating the delta between
each trial a bird participated in and afterwards entering these deltas
into LMMs as well. Results: Our findings do not corroborate
boldness-shyness as a consistent personality trait in free- flying ravens,
however, they indicate that the manifestation of boldness in this species
could be shaped by age and type of stimulus.