Black-tailed Gull vs Herring Gull

In short

The bill size and structure are key differences: the Black-tailed Gull has a more slender bill compared to the thicker bill of the Herring Gull. Additionally, the Black-tailed Gull's tail is distinctly black-tipped, unlike the Herring Gull's all-white tail. Both species have similar overall gull shapes, but these features can help distinguish them.

Identification tips

• Bill structure: Black-tailed Gull has a slender bill; Herring Gull has a thicker bill.
• Tail color: Black-tailed Gull has a black-tipped tail; Herring Gull has an all-white tail.
• Size: Herring Gull is larger and bulkier.
• Vocalization: Listen for the high-pitched 'kyow' of the Black-tailed Gull versus the 'laughing' call of the Herring Gull.
• Location: Consider geographic range; Black-tailed Gull is more common in East Asia.

Size

The Herring Gull is generally larger and bulkier than the Black-tailed Gull.

Plumage

The Black-tailed Gull has a black-tipped tail and a more uniform grey back, while the Herring Gull has a lighter grey back and an all-white tail. Both species have white heads and underparts.

Behaviour

Both species exhibit typical gull behavior, such as scavenging and loafing near water, with no significant behavioral differences noted.

Habitat

Both species are often found near coastal areas, but the Black-tailed Gull is more commonly associated with East Asian coasts, whereas the Herring Gull is widespread across the Northern Hemisphere.

Voice

The Black-tailed Gull has a distinctive, high-pitched call, often described as 'kyow,' whereas the Herring Gull's call is a more familiar, loud 'laughing' sound.