Salt Lake Tribune | 1905-06-12 | Page 17 | How Animals Escape Extermination

How Animals Escap9 Extermination How Is tho balance of life on the globe maintained? Why have not species exterminated ex-terminated species? Why have not tho birds exterminated the Ins seta and the hawks and owls exterminated the birds r Because the Insects are so much more prollllc than the Mrels and the birds so nun li m prolific than the hawks and owls Tin- hawks and owls are also more rcstrlctetl ns to food. The more adaptive an unlmni is the greater are the chances of surviving. If wolves and fox. . ahl browse like deer and sheep and rabbits, the) would be as numerous as these latter lat-ter sp.s. I. S. The pottito bug has unduly Increased in the Kaat because Its r i la abundant, and its enemies hav not appeared. The foi -t worms threatened to destroy the maple woods of some sections, till lis enemy, like the Ichnuman fly. appeared! Rabbits havo Increased unduly in . -tralla baoause their natural enemies have not kepi pace. John Burroughs, In outing