… about 5692 taxa have disappeared since the beginning of the Anthropocene era (since about 10000 BCE)
Hemiphaga spadicea (Latham)
Norfolk Island Pigeon (Hemiphaga spadicea)
The Norfolk Island Pigeon is still often regarded to as a subspecies of the New Zealand Pigeon (Hemiphaga novaeseelandiae (Gmelin)) but clearly constitutes a distinct species.
The species reached a size of 50 cm and differed from the New Zealand Pigeon mainly by the coloration of its wings, which were grey instead of green.
The Norfolk Island Pigeon was apparently last recorded in 1838 and appears to have been gone just by one year later, the reasons for its extinction are overhunting but also predation by introduced mammals, especially cats.