Ground squirrels are normally active by day and sleep at night.
地松鼠一般白天活跃晚上睡觉。
They are large ground squirrels, about the size of an average house cat.
它们是大型的地松鼠，大约是一只普通家猫的大小。
Alternatively, small mammals such as mice and ground squirrels are important in the diet of many waterfowl-nest predators and can themselves be important predators of songbird nets.
另外，小型哺乳动物，如老鼠和地松鼠是许多水禽捕食者的重要食物，它们自己也可能是鸣禽网的重要捕食者。
Ground squirrels usually live in burrows.
地松鼠通常住在地洞里。
Ground squirrels live in burrows, instead of in the trees like other squirrels.
地松鼠不象其他的松鼠生活在树上，而是住在地洞里。
Sometimes the boys would rout out little ground squirrels and chase them into the bush.
这些男孩子有时候会轰赶出一些小松鼠，追逐它们，直至它们逃进树丛。
Prairie dogs, unlike many ground squirrels, live together in big burrows on the western prairies.
草原犬鼠和许多地松鼠不一样，群居在西部大草原的大地洞中。
During long severe winters some animals, such as badgers, ground squirrels, and some insects, hibernate.
在漫漫寒冬里，有些动物，例如獾，地鼠和一些昆虫会冬眠。
It is common to see chipmunks, ground squirrels, and various species of birds gathering around camp kitchens.
通常，能见到花栗鼠、地松鼠和其他一些鸟类围在营地厨房旁边。
Scientists believe the house was occupied in summer, based on the bones from salmon and immature ground squirrels found there.
根据在周围发现的大马哈鱼和幼地松鼠的骨骼遗骸，科学家们判断这个房子修建于夏季 。
A similar situation has evolved among California ground squirrels with respect to the venom of northern Pacific rattlesnakes.
相似的演变同样发生在加利福尼亚本地松树和北太平洋响尾蛇之间。
For most of the daylight hours, the wildlife of the place-coyotes, ground squirrels, lizards, road-runners-seek rare, small spots of shade.
日照的大部分时间里，此地的野生动物———丛林狼、地松鼠、蜥蜴以及走鹃———纷纷寻觅着稀罕且又狭小的乘凉之所。
Living creatures are not numerous here: some bears, deers and many Arctic ground squirrels (in common parlance they are called "evrazhkas").
这里活着的生物并不多：一些熊、鹿、北极地松鼠(通常它们被称为“evrazhkas”)。
But ground squirrels in some parts of California, despite being one hundredth the size of humans, exhibit fairly mild effects from the venom.
但加利福尼亚部分地区的当地松鼠，并没有变大一百倍达到人的大小，毒素对其却只有轻微的副作用。
Ground squirrels, for example, use alarm signals when a predator is lurking nearby, not only to warn their peers, but also to make it known to the attacker its cover is blown.
例如，地松鼠发现捕食者在附近潜伏时会发出报警，不仅是为了警示它们的伙伴，而且还让攻击者知道自己的隐蔽已是枉然。
Red squirrels live high up in trees, while grey squirrels spend more of their time on the ground.
红松鼠生活在高高的树上，而灰松鼠则大部分时间生活在地面上。
Squirrels save by burying nuts in the ground.
松鼠储存方式是把坚果埋于泥土里面。
Squirrels hop up and grab on to an ear of corn suspended above the ground.
松鼠跳起来，抓住了悬空的玉米穗。
Squirrels hop up and grab on to an ear of corn suspended above the ground.
松鼠跳起来，抓住了悬空的玉米穗。
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