龟隶属于爬行纲,是变温动物。它们在自然界食性广,耐饥耐渴能力强,素有“千年王八万年龟”之说。但人工饲养条件下,由于环境温度、气候等因素的改变,易患病死亡。所以,欲养龟,首先要挑选一只健康的龟。挑选龟的时间宜在每年的5月～9月,此时龟正处于生长阶段,对温度、气候非常适应。健康的龟能主动进食,活动量大。而10月至次年4月间的龟或将要冬眠,或处在冬眠状态,或冬眠初醒,龟的体质、进食情况不宜掌握。其次挑选龟的体重宜在15克以上、50克以下最佳。据估计,重50克的龟已有4年龄(加温养殖例外),它们对环境的突然改变有较强的适应能力。10克以下的龟,虽活泼逗人喜爱,但 Turtle belonging to reptiles, is a variable temperature animals. They are widely edible in nature, hunger and thirst hunger ability, known as the “Millennium King eighty thousand turtles,” said. However, under artificial rearing conditions, due to changes in environmental temperature, climate and other factors, it is easy to get sick and die. So, to raise turtles, we must first pick a healthy turtle. Turtle selection time should be in May to September each year, when the turtle is in the growth stage, the temperature and climate are very adapted. Healthy turtle can take the initiative to eat, large amount of activity. The turtle from October to April next year or will be hibernating, or in hibernation, or hibernation awake, turtle physique, eating should not be mastered. Second choice turtle body weight should be more than 15 grams, 50 grams the following best. It is estimated that turtles weighing 50 grams are 4 years old (with the exception of warm-raising) and have a strong ability to adapt to sudden changes in the environment. 10 g below the turtle, though lively cute, but