At just 34-39 cm long with a 100-110 cm wingspan, the black-headed gull packs a 166-400 g body into a size that rivals a small backpack. Males can tip the scale at 400 g, while females can weigh up to 350 g, yet the two sexes overlap heavily. Despite this modest build, individuals can live beyond three decades, with the longest-recorded wild bird reaching 32.9 years.
Globally, black-headed gulls number 2-3 million breeding pairs. Europe holds the bulk, with up to 300,000 pairs nesting in Great Britain and 250,000 in Poland. Their range is still creeping westward: Iceland was first colonised in 1911, Greenland in 1969, and Newfoundland in 1977, where roughly 20 pairs now breed.
Black-headed gull chicks learn to coordinate their begging calls, turning a noisy chorus into a strategic signal. Nests typically see 3-5 begging events per hour, each lasting about a minute, with the most intense bouts appearing after the first week. By the final week, siblings synchronize their calls, reducing individual effort. This teamwork illustrates how even simple birds develop cooperative tactics to maximise feeding efficiency in crowded colonies.
When foraging in shallow water, black-headed gulls use a distinctive head-bobbing walk: a hold phase where the head steadies during single-leg support, followed by a thrust phase that creates motion parallax, helping the bird gauge depth and detect prey movement. On flat surfaces they switch to a non-bobbing gait, often as a waiting posture. This dual-mode locomotion shows how subtle changes in walking style can enhance sensory input, giving gulls a hidden edge in locating food across varied habitats.
The 2023 avian influenza outbreak hit black-headed gulls hard, killing over 4,000 birds in Great Britain alone by early May. Similar mortality spikes were reported across France, the Netherlands, Italy and Germany.
Sources
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RangeMuch of Europe and Asia, and also in coastal eastern Canada
HabitatWetlands and coastlines
DietInsects and worms
About the Black-Headed Gull
As the sun rises over the tranquil waters, a flock of Black-Headed Gulls takes to the sky, their sleek silhouettes etched against the morning light as they dance on the breeze with effortless grace. With a fluid motion, they swoop and dive, their snowy white bodies and dark, masked heads a striking contrast as they pursue the day's offerings, their piercing cries echoing across the landscape. In their nimble, aerial ballet, the Black-Headed Gulls embody the very essence of freedom and adaptability, thriving in a wide range of habitats, from coastal shores to inland lakes and rivers.
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