Thrush (bird)

• 1. Introduction

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  The thrushes are a family of birds spread across the entire world, and one of them swallows a berry, flies hundreds of miles, and leaves the seed behind in a place the parent plant could never have reached. That small act, repeated by populations migrating long distances, helps rebuild ecosystems and carries plant life across ocean barriers. These are plump, soft-plumaged birds that spend much of their time on the ground in wooded areas. They feed on insects, worms, snails, and fruit. They build cup-shaped nests and raise their young with both parents. Yet the boundaries of this family have shifted under scientists, who pulled out chats and European robins and reassigned them elsewhere. Who decides which birds belong in Turdidae, and why does it keep changing? What makes a ground-feeding bird matter to a forest? And how did a creature this ordinary end up on European dinner plates with juniper berries and polenta?

• 2. Body And Plumage

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  The great thrush stands as the largest in the family, weighing 128 to 175 g and measuring 28 to 33 cm. The blue whistling thrush looks larger and is commonly recognized as a thrush, but it actually belongs to the Old World flycatchers. The Amami thrush might grow larger still than the great thrush. Most species wear grey or brown, frequently with speckled underparts that blend into leaf litter and shadow. Their soft plumage and rounded build suit a life close to the soil, where they pick through ground cover for prey. Color here is camouflage more than display, a quiet palette for birds that hunt by hopping and watching the earth.

• 3. Diet And Nesting

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  Insects form the core of the thrush diet, but most species reach further, taking worms, land snails, and fruit, usually berries. Some thrushes stay year-round in warm climates. Others migrate to higher latitudes in summer, often crossing considerable distances to do so. Nests are cup-shaped, and some species line them with mud for strength. A clutch holds two to five speckled eggs, and a pair may raise two or more clutches in a single year. Both parents share the work of feeding and protecting the young. In nearly every case the nest sits on a branch, out in the open structure of a tree. The three species of bluebird break that rule entirely, choosing to nest inside holes.

• 4. Seeds Across Oceans

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  Plants cannot walk away from the spot where they grow, so they depend on outside carriers to move their propagules, both living and nonliving vectors. Thrushes are among those carriers, and they are unusually effective ones. Alongside birds in the families Cotingidae, Columbidae, Trogonidae, and Ramphastidae, many thrushes eat fruit heavily, swallowing seeds and later regurgitating them or passing them in their faeces. This process, called ornithochory, has moved seeds across ocean barriers in a way few other mechanisms can match. Some seeds skip the gut entirely and cling to a bird's feet or feathers instead. By that route, seeds of grasses, spores of algae, and the eggs of molluscs and other invertebrates take root in remote places after long journeys. Because some thrush populations migrate so far, they can plant the seeds of endangered species at new sites. That dispersal fights inbreeding and widens the genetic diversity of local plant life.

• 5. A Shifting Family Tree

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  Constantine Samuel Rafinesque, a French polymath, introduced the family in 1815 under the name Turdinia. The classification has moved restlessly ever since. The Turdidae once held small Old World birds like the nightingale and European robin in the subfamily Saxicolinae, but most authorities now file that group under the Old World flycatchers, Muscicapidae. Molecular phylogenetic work places Turdidae inside the superfamily Muscicapoidea and names it sister to Muscicapidae, the two families having split in the Miocene around 17 million years ago. In 2003, when the third edition of the Howard and Moore Complete Checklist of the Birds of the World appeared, the genera Myophonus, Alethe, Brachypteryx, and Heinrichia all sat within Turdidae. Later genetic studies showed those four were closer to Muscicapidae and moved them out. The genus Cochoa traveled the opposite way, leaving Muscicapidae for Turdidae. A 2026 study by Ana Dantur and collaborators built the genus-level phylogeny now in use, though it left out the monotypic Pinarornis, home to the boulder chat.

• 6. Seventeen Genera

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  One hundred ninety-four species fill the family, divided across 17 genera, with counts drawn from the taxonomy published by AviList. Turdus, the typical thrushes, dwarfs the rest at 105 species, two of them recently extinct. Zoothera, the Asian thrushes, holds 22 species including one recently extinct, and Geokichla covers 21 medium-sized thrushes. Catharus gathers 13 American thrushes and nightingale-thrushes, while Myadestes, the solitaires, also numbers 13, two of them recently extinct. Smaller groups round out the family: Sialia with three bluebirds, Cochoa with four cochoas, Stizorhina with two rufous thrushes, Neocossyphus with two ant thrushes, and Entomodestes with two solitaires. Several genera stand alone with a single bird each, among them Grandala for the grandala, Chlamydochaera for the fruithunter, Ixoreus for the varied thrush, Ridgwayia for the Aztec thrush, Cichlopsis for the rufous-brown solitaire, and Pinarornis for the boulder chat. The wood thrush keeps its own genus too, Hylocichla.

• 7. On The Plate

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  Marie-Antoine Carême, the French cook and cookery writer, recommended cooking thrushes in crépinettes and serving them with sauce Périgueux. The bird was once one of many small species trapped and eaten across much of Europe, a practice now rare. Regional kitchens each had their own method. In Italy, cooks paired thrush with polenta or grilled it on a skewer. In Belgium, the bird went into a dish with juniper berries. Elsewhere it was turned into a pâté or a terrine. A creature better known today for scattering seeds across continents once shared a table with sauce Périgueux.