CONTENTS 



Page 



Foreword v 



The Branch of Wildlife Research 1 



The General Program 1 



Organization 1 



Special Activities and Events 2 



Some Bureau services through the Branch 2 



Bird and mammal laboratories for all 2 



Bird banding 3 



Pocket gopher burrow-builder widely accepted 5 



Toxicological studies and pen tests 5 



Aid to President's Council on Science and Technology 5 



Albatross problem at Midway 6 



Employees on Fulbright fellowships 6 



Researchers serve as expert witnesses 7 



New Cooperative Wildlife Research Units 8 



Cooperative Units conduct 240 projects 8 



Bureau aids in establishment of new timber crops 8 



Some publications — released and near release 



Research Highlights 11 



Waterfowl management research 11 



Production cycle on the Lousana and Redvers areas 11 



Missouri Unit works on Manitoba potholes 11 



Production on the Yellowknife 12 



Comparison of duck production 13 



Goose production in Flathead Valley 13 



Blue, snow, and white-fronted goose production 14 



Wood ducks 14 



Maine duck study nearing completion 15 



A 38-year hunting record 15 



Mail kill surveys 17 



Draw-downs and waterfowl use 18 



Aquatic plant studies IS 



Alligatorweed 18 



Eurasian watermilfoil 20 



Salinity and aquatic plant growth 20 



Water birds on mosquito-control impoundments 20 



Hydrated lime on goose pastures 20 



Waterfowl nesting structures 20 



Other migratory birds studies 20 



Mourning dove studies 20 



Woodcock 21 



Sandhill crane investigation 22 



Upland wikUife ecology — 25 



Wildlife habitat research program setup for southwest 25 



Sampling techniques developed for measuring acorn yields 26 



Browse increased with timber cutting 26 



Snap-trap catches give estimates of small-mammal populations 26 



Inventory of pocket gopher populations 27 



Factors affecting small-mammal numbers being studied 27 



Cedar Island red squirrel study 28 



Mule deer investigations 28 



Sprayed plots remain attractive to whitetail deer 20 



Grizzly bear investigations 29 



Collared peccary and prickly pear 29 



Bighorn sheep 30 



111 



