Larger Terns
Sandwich Tern
breeding
(Mar–Jul)
breeding
(Jan–Aug)
breeding
(Jan–Jul)
breeding
(Mar–Sep)
1st-year
nonbr.
(Jul–Mar)
nonbr.
(Aug–Feb)
nonbr.
(Jul–Feb)
nonbr.
(Sep–Mar)
Elegant Tern
Royal Tern
1st-year
Caspian Tern
1st-year
Larger Terns
Sandwich Tern
breeding
(Mar–Jul)
breeding
(Jan–Aug)
breeding
(Jan–Jul)
breeding
(Mar–Sep)
1st-year
nonbr.
(Jul–Mar)
nonbr.
(Aug–Feb)
nonbr.
(Jul–Feb)
nonbr.
(Sep–Mar)
Elegant Tern
Royal Tern
1st-year
Caspian Tern
1st-year