Blue-gray mouse

The blue-gray mouse (Pseudomys glaucus) is an Australian rodent known only from a few specimens found in eastern Australia, and since presumed to have become extinct, according to the Wikipedia article that serves as this entry's source. Oldfield Thomas described it in 1910. Only three specimens are known, two from Queensland and one collected further south at Cryon in New South Wales. The animal resembled the house mouse, with a robust body, fine dense fur that was white underneath and pale blue-gray above, and a white-haired tail slightly longer than the head and body, which measured 95 millimetres. Its weight range was 25 to 30 grams.