Suet is recommended for insect-eating birds like nuthatches and woodpeckers. Species boundaries in the nuthatches are difficult to define. Included are grouse, buntings, thrushes, nuthatches, woodpeckers and jays. Similarly, the rock nuthatches wedge snails into suitable crevices for consumption in times of need. China has the greatest diversity of nuthatches of any country. Smaller birds, including songbirds, nuthatches, woodpeckers and flycatchers inhabit the surrounding pine forests. The appearance of the blue nuthatch differs significantly from all other nuthatches. In either case, it is very closely related to the nuthatches. Deforestation has also caused population declines for the vulnerable Yunnan and yellow-billed nuthatches. Relatively, brown creepers are smaller than white-breasted nuthatches but larger than golden-crowned kinglets. Three species of nuthatches have been recorded in Georgia. The bird has been described at times as the most timid of nuthatches. Nuthatches move on trees with short leaps, and do not use their tails for support. Introduced ring-necked parakeets may also compete with Eurasian nuthatches for nesting holes. The species is of medium size compared with other nuthatches, measuring in length.