Landlocked country one, making them the biggest contiguous group in the world. Also, the Central Asian and Caucasian clusters can be considered contiguous, joined by the landlocked Caspian Sea. Mongolia is almost part of this cluster too, being separated from Kazakhstan by only , across Russian or Chinese territory. There are the following "single" landlocked countries (each of them borders no other landlocked country): If the Caucasian countries and Kazakhstan are counted as part of Europe, then Europe has the most landlocked countries, at 20. If these transcontinental countries are included in Asia, then Africa has the most, at 16. Depending on
Fat-tailed gerbil many rodents can react allergically to them, and may develop respiratory problems. Aspen wood shavings are considered to be the best. They also need to take a sand bath regularly to prevent their fur from becoming greasy. Fat-tailed gerbils will make a nest; this may be underground in their burrow, on the surface in the bedding, or in a nesting box. Fat-tailed gerbils can be kept occupied by giving them gerbil toys, for example an exercise wheel. Keeping a breeding pair can be somewhat difficult. It is possible to keep fat-tailed gerbils singly, like Syrian hamsters. Fat-tailed gerbils are sociable