Differences in the relative abundance of microbial taxa among age classes.

<p>Presence (%) and differences in the relative abundance of bacterial and fungal taxa (separated from bacterial taxa by /) among birds of different age classes (only different–level phylotypes with at least 10% abundance in one age class are presented). A: choana, B: crop, C: cloaca; a = significantly more common, b = significantly less frequent (<i>p<0</i>.<i>05</i>).