The most arresting image of the 2026 World Cup’s opening week was not a goal celebration or a stadium panorama, but a two-year-old duck waddling through Mexico City in a miniature national jersey and socks. Merlín, a Pekin duck who accompanies his owner Carla Gómez as she sells bottled water from a cart in the historic centre, became an internet sensation within hours of Mexico’s victory over South Africa. Footage of his promenade along Paseo de la Reforma, confirmed by the capital’s C5 surveillance centre, has now been viewed millions of times. The bird has since been feted with his own norteño-style corrido, composed by the Mexican Armed Forces, and was named guest of honour by FIFA for the host nation’s second group match against South Korea at the Zócalo Fan Fest.

Viewed from Mexico City, the Merlín phenomenon is both a folkloric eruption and a commercial windfall. The Fan Fest itself generated 322 million pesos in its first seven days, according to the capital’s chamber of commerce, with an average daily attendance of 82,400 and per-capita spending of up to 1,150 pesos on food and drink. Officials project the tournament will leave 26 billion pesos in the city. Yet the festive mood has not been seamless: videos circulated of scuffles between police and fans attempting to enter the Fan Fest via Calle Madero before the South Korea match, with overcrowding leading to pushing and blows, though no injuries were reported. The incident underscores the logistical strain of hosting mass gatherings even as authorities are praised for overall organisation.

Across the Atlantic in Boston, a rival has emerged. The Tartan Army, Scotland’s travelling support, brought their own duck draped in a Saltire to Fenway Park, a riposte captured by the BBC and framed as a light-hearted “war of ducks”. The Scottish contingent, back in the World Cup after 28 years, has injected its own carnival atmosphere into the US leg of the tournament. Meanwhile, in Vancouver, the commercial ripple is unmistakable: a Canadian Tire store was filmed selling plastic duck figurines dressed in various national team shirts, a trend driven by Mexico’s diaspora and the sheer virality of the original. Merlín has thus become an exportable symbol, a folk mascot crossing borders in a way official branding rarely achieves.

Analysts in London note that animal mascots have a long, if sporadic, history in World Cup lore, from Paul the octopus in 2010 to Pickles the dog who recovered the stolen Jules Rimet trophy in 1966. Merlín, however, represents something distinct: a bottom-up, unsponsored emblem born of street commerce and domestic affection. His owner describes him as “the baby, the sole heir to all my possessions and now an idol,” a sentiment that resonates far beyond Mexico. The appearance of a purported “girlfriend” duck named Juanita at the Fan Fest, alongside a dog called Sultán, suggests a burgeoning ecosystem of animal supporters.

Looking ahead, the Merlín story is likely to evolve as the tournament progresses. His presence at official events signals FIFA’s willingness to embrace spontaneous cultural phenomena, yet it also raises questions about the commodification of grassroots symbols. Should Mexico advance deep into the knockout stages, the duck’s talismanic status will only intensify, and the Scottish rival may be joined by other national fauna. For now, the World Cup’s most memorable ambassador is a duck who enjoys carnitas tacos and has never kicked a ball.