Figure 1.

Preference for natal-like habitats by dispersing snail kites. (a) Both 1 year old dispersing individuals (natal dispersal; white) and all ages combined (grey) prefer wetlands of the same type (palustrine or lacustrine) as their natal origin. Shown are relative probabilities, controlling for distance effects, from best models for 1 year old birds and all birds combined. (b) Yet as individuals age, natal habitat preference declines. (c) Birds born in drought years are less likely to show natal habitat preferences based on wetland type. In (b,c), shown are relative probabilities of selection based on best conditional logit models (i.e. the probability of selection conditional on one selection among all possible wetlands). For (b), dots show raw frequencies (summarized in 2 year intervals), with dot size proportional to sample size.