Table 1.

Description of levels of feather damage (from [15]).

score	description of body	flight feathers
0	well feathered body part with no/little damage	intact
1	slight damage with feathers ruffled, body is completely or almost completely covered	few feathers separated and/or broken/missing
2	severe damage to feathers, but localized naked area (<5 cm2)	all feathers separated and several broken/missing
3	severe damage to feathers and large naked areas (>5 cm2)	most feathers broken/missing
4	severe damage to feathers and large naked areas (> 5 cm2)	all feathers missing/broken and/or broken skin