(Rissa tridactyla)

Example 1

Date: April 2000
Origin: Prey of Goshawk (with oil pollution on the feathers)
Location: Noord-Hollands Duinreservaat, NL
Age and sex: Adult
Feathers: 5 Primaries

Example 2

Date: 19 july 1992
Origin: Bird had fallen out of it's nest.
Location: Bass Rock, North Berwick, Scotland
Age and sex: Juvenile
Feathers: Tailfeathers

Example 3

Date: 1 january 2005
Origin: Victim of oilpollution
Location: Terschelling, NL
Age and sex: Adult
Feathers: 9 Primaries