Front Matter

1-4

Results of wildfowl ringing at Abberton Reservoir, Essex 1949 to 1966

28-35

A survey of the ducks breeding at Loch Leven in 1966

36-42

Part I. Development of the wildfowl population

43-46

Part II. The feeding ecology of local Mallard and other wildfowl

47-54

Part III. An appraisal of the planting programme, 1959-66

55-61

Part IV. Expenditure for habitat improvement

62-63

Population changes and mortality of the Mute Swan in Britain

64-73

A preliminary study of the Mute Swan, Cygnus olor

74-84

Immigrant Mute Swans in south-east England

85-87

Some parameters of 'nonsense' orientation in Mallard

88-97

Observations on the behaviour and relationships of the White-backed Duck and the Stiff-tailed Ducks

98-107

Breeding behaviour of captive Shovelers

108-121

Experiments with young nidifugous birds on a visual cliff

122-124

The significance of clutch-size in waterfowl

125-128

Geese on the Hortobgy, autumn 1966

129-133

Observations on the Pink-footed Goose in central Iceland, 1966

134-141

Food habits of sea ducks from the north-eastern United States

142-145

Experience in waterfowl management under the conditions prevailing in the Latvian S.S.R

146-149

Wildfowl survey in south-west Asia: progress in 1966

150-152

Melanistic White-fronted and other Grey Geese

153-154

A bigamous Greylag gander

155

Drake Harlequin escorting its family

155

Techniques for rapid extraction of ingested food from wildfowl viscera

156-157

Comparison of techniques for the analysis of wildfowl viscera

158-161

Accounts

162-163

The Wildfowl Trust Eighteenth Annual Report

Annual Report

5-7

19th Annual General Meeting

8-9

The collections in 1966

10-13

conservation ,education and research, 1966

14-16

Wild Geese at the New Grounds

17

Ringing

17

Borough Fen Decoy, 1966

20-21

Dersingham Decoy

22-23

The Bewick’s Swans at Slimbridge

24-27