2 7 – 2 8 ▁days , ▁and ▁they ▁have ▁ 2 – 6 ▁cub s ▁per ▁l itter . ▁C ubs ▁are ▁born ▁n aked ▁and ▁blind , ▁we igh ing ▁only ▁. ▁After ▁their ▁eyes ▁open ▁at ▁ 1 4 ▁to ▁ 1 6 ▁days ▁old , ▁they ▁m ature ▁quickly . ▁The ▁mother ▁usually ▁moves ▁the ▁young ▁when ▁they ▁are ▁ 9 ▁to ▁ 1 0 ▁days ▁old ▁and ▁if ▁dist urbed ▁leads ▁them ▁by ▁car av anning ▁them ▁to ▁a ▁new ▁location . ▁The ▁young ▁E tr us can ▁sh rew s ▁are ▁we an ed ▁at ▁ 2 0 ▁days ▁old . ▁By ▁three ▁to ▁four ▁weeks ▁of ▁age , ▁the ▁young ▁are ▁independent ▁and ▁are ▁soon ▁sex ually ▁m ature . ▁ ▁Distribution ▁The ▁E tr us can ▁sh rew ▁inhab its ▁a ▁bel t ▁extending ▁between ▁ 1 0 ° ▁and ▁ 4 0 ° N ▁latitude ▁across ▁E uras ia . ▁In ▁Southern ▁Europe , ▁it ▁has ▁been ▁found ▁in ▁Alban ia , ▁Bos nia ▁and ▁Herz egov ina , ▁Bulg aria , ▁Cro atia , ▁Cy pr us , ▁France , ▁North ▁Mac ed onia , ▁Mal ta , ▁Mont en eg ro , ▁Greece , ▁Italy , ▁Portugal , ▁Sloven ia , ▁Spain , ▁and ▁Turkey , ▁with ▁un conf ir med ▁reports ▁in ▁And or ra , ▁Gib ral tar ▁and ▁Mon aco ; ▁it ▁has ▁been ▁introduced ▁by ▁humans ▁to ▁some ▁European ▁islands , ▁such ▁as ▁Can ary ▁Islands . ▁