Table 1. Results on feather-degradation time by Bacillus licheniformis (applied in vitro) and tested on Bearded Vulture covert and body feathers of different original colours, covered or not by iron oxides.

Feather number	Basal color	Stained	Days to full degradation
1	White	yes	7
2	Part white/part dark	no	7
3	Part white/part dark	no	7
4	Dark	yes	7
5	Dark	yes	7
6	Dark	no	7
7	Dark	no	7
8	White	yes	7
9	White	yes	7