BIRDS OF PEASEMARSH 



run out, and so they have returned spring after 

 spring, bringing others with them. 



To obtain success, however, a sanctuary, 

 when once established, should be carefully 

 guarded. It is just as important to retain as 

 it is to gain the confidence of the birds. The 

 experience here shows that every sanctuary 

 should be established on a permanent basis. 

 Increasing the number of birds will increase 

 the number of bird enemies, unless these are 

 constantly kept down. To attract birds to any 

 spot and then, when they have learned to know 

 the spot as a haven of safety, to cease to give 

 them the protection which made it safe, may 

 result in more loss of bird life than if the 

 sanctuary had never been established. 



Much as one sanctuary in a district can do, 

 it has its limitations. The birds do not know 

 the boundary of the sanctuary and accidents 

 may befall them when they are beyond its 

 limits or passing on in their migratory flight. 

 Especially has this been the case with game 

 birds, numbers of which have so often been 

 shot when passing on from a sanctuary where 

 they have fed and rested. A line of sanctuaries 

 that provide food and resting places for birds in 

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