The golden plover is another remarkable example, as the bird is wild in every country that it inhabits, even where the report of fire-arms never has been heard. The wagtails, on the contrary, are tame and confiding throughout all places, whether civilised or savage. The swallows are the companions of the human race, nesting beneath their eaves, and sharing the shelter of their roofs in every clime. Why this difference exists in creatures subjected to the same conditions is a puzzle that we cannot explain. In like manner we may observe the difference in animals, many of which are by nature extremely timid, while others of the same genus are more bold. The beasts of prey vary in an extraordinary degree according to their species, which are in some way influenced by circumstances. Tigers and lions are naturally shy, and hesitate to expose themselves unnecessarily to danger; both these animals will either crouch in dense covert and allow the passer-by to continue his course, or slink away unobserved, if they consider that their presence is undetected. Nevertheless these animals differ in varying localities, and it is impossible to describe the habits of one particular species in general terms, as much depends upon the peculiarities of a district which may exercise an effect in influencing character. The tigers that inhabit high grass jungle are more dangerous than those which are found in forests. The reason is obvious; the former cannot be seen, neither can they see, until the stranger is almost upon them; they have accordingly no time for consideration, but they act upon the first impulse, which is either to attack in self-defence or to bound off in an opposite direction. If the same tiger were in a forest it would either see the approach or it would hear the sound of danger, and being forewarned, it would have time to listen and to decide upon a course of retreat; it would probably slink away without being seen. Although the usual bait for a tiger is a young buffalo, there is no animal that is held in greater respect by this ferocious beast than an old bull of that species. It is by no means an uncommon occurrence that should a tiger have the audacity to attack a buffalo belonging to a herd, the friends of the victim will immediately rush to its assistance, and the attacking party is knocked over and completely discomfited, being only too glad to effect a retreat.