The wolf may lose his teeth,but never his nature.
狼的牙齿会掉，本性却改不了
He who keeps company with a wolf will learn to howl.
跟狼在一起, 就会学狼叫; 近墨者黑。
Dont trust a goat with the kitchen-garden,or a wolf with sheepfold.
不能请羊管菜园，不能请狼管羊圈。
A growing youth has a wolf in his belly.
年轻人，在成长，吃起饭来像饿狼。
When the fox preaches， take care of your geese.
黄鼠狼给鸡拜年，没安好心。
A thief knows a thief as a wolf knows a wolf.
贼了解贼，正如狼了解狼。
He that makes himself a sheep shall be eaten by the wolf.
甘心做绵羊，必然喂豺狼。
It is a foolish sheep that makes the wolf his confessor.
蠢羊才向狼忏悔。
The life of the wolf is the death of the lamb.
有活的狼就有死的羔羊。
The lone sheep is in danger of the wolf.
孤羊逢狼，必然遭殃。
以下为收集的几条有关的狼的英文谚语：
When the fox preaches， take care of your geese。——黄鼠狼给鸡拜年，没安好心。
The wolf may lose his teeth，but never his nature。——狼的牙齿会掉，本性却改不了。
Don’t trust a goat with the kitchen-garden，or a wolf with sheepfold。——不能请羊管菜园，不能请狼管羊圈。
Who keeps company with wolves， will learn to howl。——和狼在一起，就会学狼叫。（近朱者赤，近墨者黑）
A wolf in sheep’s clothing——匹着羊皮的狼。