Front Matter

1-4

Aerial survey

26-28

Wildfowl food research

29-30

Comparative behaviour of the Anatidae and its evolutionary implications

31-45

Experiments on the causation of the threat postures of Canada Geese

46-52

Injury-feigning in the Anatidae

53-54

The Pink-headed Duck

55-60

The B.B.C./I.U.C.N. Darwin Centenary Expedition to the British Virgin Islands, Trinidad, Panama, Ecuador and the Galapagos Islands. January-March 1959

61-76

Goose-netting in the Netherlands

77-79

The Brent Goose in the Soviet Union

80-93

Brent Goose population studies, 1958-59

94-98

A spring visit to Denmark

99-102

Aerial survey of wildfowl in the Highlands of Northern Scotland in the spring of 1959

103-106

The Shelduck population in the Bridgwater Bay moulting area

107-117

The numbers of ducks caught in Borough Fen Decoy, 1776-1959

118-122

Lead poisoning in wildfowl

123-134

A technique for removing wildfowl viscera for research

135-136

A breeding population of the Mallard

137-143

Duck catching in Iceland

144-149

Haemorrhage from an oesophageal diverticulum causing death in a wild Mallard

150-152

Tuberculosis in a wild Pochard and remarks on the recognition of disease by predators

152-153

Natural weld in a Mallard and a Pink-footed Goose

154

Mute Swans feeding on fallen Prunus blossom

154

Greylag Geese feeding on the stalks of dandelion

155

Wigeon feeding on moss

155

Diving behaviour of Shelducks

156

Large-billed Bewick's Swan in Somerset

156-157

The Wildfowl Trust Eleventh Annual Report - part 1

The Wildfowl Trust Eleventh Annual Report - part 2

Report

5-7

The Trust Collections

8-17

Trust Research 1958-59

18-29