The eBirdr field guide

Bird Advisor

Describe what you saw. We’ll narrow the field together.

Question 9 10 possible birds

What SHAPE was the TAIL ?

Choose the answer that comes closest to what you observed.

Square or slightly notched at the end Rounded at the end Pointed or wedge-shaped Forked Unknown

Not completely sure? Choose Unknown when it is available—a careful “I don’t know” is more useful than a guess.

Your observation 8 answers recorded · open to review or change

1
What TYPE of bird was seen ? Gull-like, or a Seabird
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2
What colour was the BILL ? Unknown
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3
How BIG was the bird ? Crow-sized
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4
What colour were the LEGS or FEET ? Unknown
Change
5
What colour was the THROAT ? Olive (yellowish-green)
Change
6
What colour was the TOP of HEAD ? Unknown
Change
7
What colour were the EYES ? Yellow or olive
Change
8
WHERE was the bird seen ? Northwestern Canada or United States
Change

Leading possibilities

10 possibilities remain

1 rule inferred

1
Heermann's Gull
Why this matches 3 supporting observations
- What TYPE of bird was seen ? Gull-like, or a Seabird
- How BIG was the bird ? Crow-sized
- WHERE was the bird seen ? Northwestern Canada or United States
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2
Thayer's Gull
Why this matches 3 supporting observations
- What TYPE of bird was seen ? Gull-like, or a Seabird
- How BIG was the bird ? Crow-sized
- WHERE was the bird seen ? Northwestern Canada or United States
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3
Glaucous Gull
Why this matches 4 supporting observations
- What TYPE of bird was seen ? Gull-like, or a Seabird
- How BIG was the bird ? Crow-sized
- What colour were the EYES ? Yellow or olive
- WHERE was the bird seen ? Northwestern Canada or United States
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4
Slaty-backed Gull
Why this matches 4 supporting observations
- What TYPE of bird was seen ? Gull-like, or a Seabird
- How BIG was the bird ? Crow-sized
- What colour were the EYES ? Yellow or olive
- WHERE was the bird seen ? Northwestern Canada or United States
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5
Herring Gull
Why this matches 3 supporting observations
- What TYPE of bird was seen ? Gull-like, or a Seabird
- How BIG was the bird ? Crow-sized
- What colour were the EYES ? Yellow or olive
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Showing the strongest matches so far. Keep answering—the order may change.