1 NOVEMBER 1930, Page 18


The group of young biologists in Oxford who are studying the " periodicity " of certain animals are anxious for informa- tion about red and grey squirrels and field voles (or short- tailed field mice). They desire facts about the increase or decrease in numbers. Have any dead or diseased animals been found ? What foods have the animals been noticed to favour? Other interesting information on rodents would be appreciated. Information should be sent to A. Middleton, University Museum, Oxford. In my own district the increase of greysquirrels