Image of a partially submerged Bonaparte's Gull.
Image of a partially submerged Bonaparte's Gull.
Image of a Bonaparte's Gull in flight.
Image of a Bonaparte's Gull (below) alongside a Black-headed Gull (above).
Increasing fractions of a 1st-winter Bonaparte's Gull 😄 showing under/upper-wing markings & coloration, plus structural diffs compared to Black-headed Gull. Lynch Cove (Dorset), April 2026. Nice find by @luvaducksbutt.bsky.social