| Adult | ||
 malar stripe (black mark on cheek) |  black bill pale bluish spot on the lower part of the upper mandible |  narrow dark bars across the secondaries and inner primaries on underside of wing |
| Nestling | ||
 brown eyes yellow or greenish cere |  small feet |
| Adult | ||
malar stripe (black mark on cheek) | black bill pale bluish spot on the lower part of the upper mandible | narrow dark bars across the secondaries and inner primaries on underside of wing |
| Nestling | ||
brown eyes yellow or greenish cere | small feet |