Glossary

adult: AD
juvenile: JUV
immature: IMM
1st calender year: 1CY
1st winter: 1W
1st summer: 1S

male: M
female: F

summer plumage: SUM
winter plumage: WIN
breeding plumage: BREED
non-breeding plumage: NBREED
eclipse plumage: ECLPS
dark morph: DARK
intermediate morph: IMED
pale morph: PALE

acoustic comparison species: (a)
visual comparison species: (v)