Madeiran Thrush (Turdus sp.)
This up to now undescribed taxon is known only on the basis of subfossil remains that were found (quite commonly) on the island of Madeira. [2]
The Madeiran Thrush was a large, long-legged species, apparently adapted to a terrestrial lifestyle, it is not known if the species was flightless, but it was very likely a poor flyer and a typical tame (naive) island bird with no fear for humans or other mammals ….
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Today, the only species of thrush inhabiting the island of Madeira is the native Blackbird (Turdus merula ssp. cabrerae Hartert) with a subspecies that also inhabits the Canary Islands.
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References:
[1] Harald Pieper: The fossil land birds of Madeira and Porto Santo. Bocagiana 88: 1-6. 1985
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edited: 20.02.2020