Had to be hummingbirds, the mice are so small!
Some of 'em grow to about half a pound.
Exceprted from this source.
The single species, Myoxus glis, occurs from France and northern Spain to the Volga River and northern Iran and on the islands of Sardinia, Corsica, Sicily, Crete, and Corfu (Corbet 1978); it also is present in England as the result of introduction . . . .
Head and body length is 130-90 mm, tail length is 110-50 mm, and weight is 70-180 grams (Van Den Brink 1968). The short, soft, thick pelage is silvery gray to brownish gray on the upper parts, lighter on the flanks, and white or yellowish on the underparts. This squirrel-like animal has large and rounded ears, small eyes, and a long, densely bushy tail. The hands and feet, with their rough pads, are adapted for climbing. Females have 10 or 12 mammae (Ognev 1963) . . . .
The edible dormouse inhabits deciduous or mixed forests and fruit orchards in both lowlands and mountains . . . .
In some areas Myoxus is considered extremely harmful to the production of fruit and wine. It consumes large amounts of apples, pears, plums, and grapes and has been reported to destroy one-third of the grape crop in the northern Caucasus. However, it is easily trapped, there is some demand for its luxuriant fur, and it is hunted for use as food and a source of fat. In ancient Rome Myoxtis was considered a delicacy, and colonies were kept in large enclosures planted with nut-bearing bushes and provided with nesting sites. Prior to a feast, individual animals would be confined to earthen urns and fattened on acorns and chestnuts. The meat of Myoxus is still a gourmet dish in some parts of Europe.