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    "headline": "Willie wagtail, a 20-gram Australian fantail, dive-bombs laughing kookaburras over 10 times heavier",
    "description": "The willie wagtail, a 17 to 24 gram Australian fantail, harasses laughing kookaburras over 10 times heavier, aiming at the tail during nesting season.",
    "datePublished": "2026-11-15T15:06:00+00:00",
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    "keywords": "Australia, fantail, laughing kookaburra, willie wagtail",
    "articleBody": "A bird weighing about 20 grams will chase a laughing kookaburra out of its territory, and it usually aims for the tail. The willie wagtail, one of Australia’s most familiar backyard birds, is famous for picking fights with animals many times its size. An adult wagtail weighs 17 to 24 grams. A male laughing kookaburra averages about 307 grams and a female about 352. Using the heaviest wagtail and the lighter male average, the kookaburra is still roughly 13 times heavier; against a light wagtail and an average female, the gap stretches past 20 to one. Not a wagtail at all Despite the name, the willie wagtail (Rhipidura leucophrys) has nothing to do with the true wagtails of Europe and Asia. It belongs to the fantails, and DNA work places it in a broad group of birds that also includes crows, ravens and birds of paradise. The “wagtail” part comes from its habit of swinging its tail from side to side while it hunts insects on the ground, a move that may help flush prey out of the grass. It is black above and white below, with a white eyebrow that does a lot of talking. When the bird is spoiling for a fight, those eyebrows flare wide; when it backs down, they settle and almost disappear. How a wagtail picks a fight Wagtails defend territories of about 1 to 3 hectares, and they are fearless about it. The list of targets runs from small songbirds to Australian magpies, ravens, wedge-tailed eagles and laughing kookaburras. Dogs, cats and people who wander too close to a nest get the same treatment, and in Western Australia wagtails have even been seen harassing snake-necked turtles and tiger snakes. The approach: the wagtail swoops at the intruder’s back end and steers clear of the head and beak. The soundtrack: a rapid, rattling “chit-chit-chit” alarm call, which also alerts its mate. The timing: both males and females attack, and they do it hardest in the breeding season, which runs from July to December. That calendar means mid-November, right now, is peak season for these skirmishes across much of Australia. Why the kookaburra barely flinches The laughing kookaburra is the largest kingfisher in the world, 41 to 47 centimeters long with a heavy bill, and it is used to being the one doing the hunting. It sits on a branch, waits and drops onto lizards, insects, mice and snakes. Its menu also includes small birds and nestlings, which gives a nesting wagtail every reason to chase it off. Kookaburras run their own territorial disputes with their famous laughing chorus and swooping flight displays aimed at rival family groups, not at tiny fantails. Against a 20-gram attacker that keeps away from the beak, the big bird often just sits it out, which is why so many backyard videos show one bird furious and the other apparently unbothered. The wagtail’s personality has not gone unnoticed by the people who have lived alongside it longest. The Gamilaraay and Yuwaalaraay peoples of northern New South Wales call it dhirridhirri, a name that has also come to mean “troublemaker” or “nosey person”. Bird brains are quicker than many people assume, as our story on carrion crows making decisions in 235 milliseconds showed. For another unexpected Australian bird visitor, read about Gus the emperor penguin’s 3,500-kilometer swim to Western Australia. Wagtails usually pair for life and can raise up to four broods between July and December, so the dive-bombing will keep going until the end of the year. Further reading Wikipedia: Willie wagtail Wikipedia: Laughing kookaburra Image: JJ Harrison, CC BY-SA 4.0 via Wikimedia Commons This article was produced with AI assistance and reviewed by our Editorial Desk. How we work.",
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