Pond Life 
liable to be flooded, the flood-water could 
transfer the animals and plants of one 
pond to another; but floods could not 
account for every pond being stocked 
with sticklebacks. It would be interest- 
ing to know whether ponds situated on 
high ground, which could not possibly be 
reached by floods, are stocked with them 
or not. I think that they would be 
found in such places. I know that many 
lochs high up in the Scotch and Welsh 
mountains contain trout, but possibly 
these may be connected by streams along 
the valleys. 
The stickleback’s nest is a very inter- 
esting thing to see, and it is easy to do 
so by keeping a few sticklebacks in a 
common glass globe. This should have 
a layer of sand or gravel, and some 
water-weeds to grow in it ; without these 
88 
