In 1815, the French polymath Constantine Samuel Rafinesque introduced the family Turdidae under the name Turdinia. For over a century, biologists grouped small Old World species like the nightingale and European robin within this large family. The subfamily Saxicolinae contained these birds alongside true thrushes until modern science intervened. Molecular phylogenetic analysis revealed that the family Turdidae is actually sister to the family Muscicapidae. These two families diverged in the Miocene around 17 million years ago. By 2003, the third edition of Howard and Moore Complete Checklist of the Birds of the World listed genera Myophonus, Alethe, Brachypteryx, and Heinrichia as part of Turdidae. Subsequent studies showed these four genera belong more closely to Muscicapidae. Consequently, they were moved out of the thrush family. In contrast, the genus Cochoa had previously been placed in Muscicapidae but was shown to belong in Turdidae. This reclassification reshaped how scientists understand the evolutionary history of these birds.
Physical Characteristics And Behavior
Thrushes are plump, soft-plumaged, small to medium-sized birds that inhabit wooded areas. They often feed on the ground among insects, worms, land snails, and fruit. Most species display grey or brown coloring with speckled underparts. The largest known thrush is the great thrush, though the Amami thrush might grow even larger. The blue whistling thrush appears large but belongs to the Old World flycatcher family instead. Many species remain permanently resident in warm climates while others migrate to higher latitudes during summer. These migrations cover considerable distances across continents. Thrushes build cup-shaped nests sometimes lined with mud. They lay two to five speckled eggs and may produce two or more clutches per year. Both parents help raise the young offspring. Almost all species place their nest on a branch. Three species of bluebird break this rule by nesting inside holes. Their feeding habits include consuming berries which play a key role in seed dispersal later.Ecological Impact On Seed Dispersal