Show I Few Agricultural Pests i Without Bird Enemies The United States biological survey survey survey sur sur- vey in Farmers' Farmers Bulletin F describes describes describes de de- de- de scribes the Usefulness of Birds on of the bureaus bureau's division of ot food habIts habIts habits hab hab- its rese research says that hardly an agricultural agricultural agricultural ag ag- ag- ag pest exists but has effectIve effective effective ef ef- ef- ef bird enemies In Utah during aur dur ing an alfalfa weevil outbreak bIological biological bi bI- survey scientists found 4 45 species of birds attacking the pest One killdeers killdeer's stomach examined In Inthis Inthis Inthis this Investigation contained Individual In weevils and the contents of ofa ofa a brewers brewer's blackbirds blackbird's stomach showed that the bird had eaten weevils constituting 90 00 per cent of its foo food 1 The every everyday services of at birds in consuming Insects of all kinds and holding back the threatening threat ening tide of ot Insect life are probably probably probably ably of ot greater significance than their emergency help A list published pub pub- in the tile bulletin shows that the cotton-boll cotton weevil has 68 66 bird enemies the gypsy moth 40 46 the army worm 43 leaf hoppers the potato beetle 34 and wireworms Rural New York |