推荐回答（4个）
大鳄龟(详情介绍)
鳄龟，无疑是大家公认的最凶猛的龟，不仅个体较大，同时又有着极强的攻击力及令人生畏的咬合力。除此之外，玳瑁、鹰嘴也是很凶猛的龟类之一。
人工饲养的鹰嘴幼体喜食活饵，可喂食小型鱼类，泥鳅或虾类，经过驯饵亦可喂食泽龟饲料或死鱼等。成体的食材较为广泛，会猎食任何可吞下的生物，包含同类在内的其它龟种。咬合力巨大，每平方英寸500kg的咬合力足以咬碎小型龟类的背甲。生长速度快，但受环境因素影响狠大。
1.形态特征：北美洲最大的淡水龟，头部较拟鳄龟大，嘴如鹰喙，背上有三列发达的锯齿状背棱，在肋盾和缘盾间有一排较小的鳞片，尾巴长。全身为深褐色，常张开嘴利用粉红色虫状舌头吸引鱼类前来，再突然闭口加以捕食。
2.繁殖：交配季节自二月至四月，雌龟与雄龟于水中交配。并于四月至六月产下8~52枚卵，卵呈球型，长约为3~5cm。孵化期约为100~140天。
3.区别大鳄与小鳄
大鳄：头类似三角型，背甲有突出的锥型，口腔的肉是黑色，有一个红色象蚯蚓一样的东西(诱饵)来捕食鱼类，比小鳄胆子小、生长慢、个体大。
小鳄：头类似圆筒型，背甲较平，口腔的肉是白色或浅色，相反，生长速度比大鳄快，但最终没有大鳄个体大，主动攻击、凶猛。
世界上最小的大陆型陆龟
鹦嘴龟 Parrot-beaked tortoise (Common Padloper tortoise)
学 名 homopus areolatus
原 产 地 南非
栖息环境 多岩沙漠地带.
体 长 背甲9-12公分.
适 温 摄氏15-30度.
鹦嘴龟是所有陆龟当中体型最小的一种.甚至比饼乾龟还要小上一号.不过习性却与饼乾龟十分类似,它们平常都在多岩石的区域活动,只要受到惊吓就立刻躲入岩石缝中,或是岩石底下.鹦嘴龟(Homopus)共有五个种类,分别是:
普通鹦嘴龟 Homopus areolatus
斑点鹦嘴龟 Homopus signatus signatus / 细点鹦嘴龟Homopus signatus cafer
卡鲁鹦嘴龟 Homopus boulengeri
伯格鹦嘴龟 Homopus bergeri
大鹦嘴龟 Homopus femoralis
其中只有斑点鹦嘴龟有一个亚种细点鹦嘴龟(H. signatus cafer).这五种鹰嘴龟全部都分布在南非的角省,可以想见栖地一定很狭小.也是南非的特有龟种.在宠物市场上鹦嘴龟数量极少,又以普通鹦嘴龟比较常见,其次就是斑点鹦嘴龟.这两个种类也是比较能够适应人工环境的种类.其他三种都几乎未曾出现过,也几乎无法在人工环境下 存活.
鹦嘴龟对於食物的需求十分特殊,除了原生地的特殊耐旱植物以外,很难适应人工环境下的一般蔬果食物,所以在食物的选择上会很棘手,最好以仙人掌类的食物为主食,小黄瓜是替代食物,其他食物如胡萝卜,南瓜,叶菜类等就必须一样一样试,找出它们比较喜欢的食物,否则要养好鹦嘴龟是十分困难的.它们十分耐乾旱,因此饲养的环境必须保持非常乾燥.底材以乾燥爬虫沙或 赤玉土为主.要多布置岩块供它们栖息.还要放置水盆供饮用,此外饲养缸要注意盖好,鹦嘴龟也是爬墙高手,身手矫健,很善於脱逃.
雌雄辨别并不困难,雄龟尾巴粗长,雌龟则圆短.特别的是普通鹦嘴龟的鼻尖在繁殖期会变红,下巴也会略带红色.雌龟每年产卵一次,每次产卵1颗,在28-30度之间约115天孵化,时间较一般龟种长很多.初生幼龟大约长3 公分.基本上鹦嘴龟的饲养难度很高,尤其是幼龟,只适合老手饲养,但是死亡率还是很高.所以要购买这种高价龟种,最好三思而后行.
太平洋上大一个小岛上的象龟
成年龟身高2到3米.长5到6米.寿命1000年左右.性情温和,和岛上的人很和睦.喜欢吃的食物是当地岛上的一种仙人树.被人发现有只象龟掉进满是石头的山崖,整整两年没吃食物呢.
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