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Parasitism of a Herring Gull by the duck leech

01 September 1954 Comments Main paper O N February 13th, 1954, an adult Herring Gull (Larus argentatus) was found at the edge of Blagdon lake, north Somerset, unable to fly and gaping continuously. It was kept in captivity, but died the following day after being forcibly fed with sardine. A d...

Notes

01 October 1953 Comments Notes The winter food and ecological distribution of Greenland Whitefronted Geese in Britain.--It has long been evident that the natural habitat and the distribution of the typical race of the White-fronted Goose (Anser a. albifrons) and of the Greenland form ...

The status of the Black-headed Gull colony at Ravenglass

01 January 1952 Comments Main paper there is an interesting association of several species of sea and shore birds breeding on the Drigg sandhills opposite Ravenglass in large numbers, the site has received little serious study and is generally known only for the size of the colony of Black-...

Head flagging in the Black-headed Gull; Its function and origin review

01 January 1952 Comments Main paper (Dept. of Zoology, Oxford University) STUDIES of the reproductive behaviour of various birds and fish have led to the conclusion that many elements of courtship, threat, and other types of display are " derived " movements. Some of these, such as the peck...

"Smoke-bathing" of Starling and of Herring- and Black-headed Gulls

01 August 1948 Comments Main paper ...

Attacks on Diving Birds by Black-Headed Gulls

01 June 1944 Comments Main paper [In connexion with Mr, Ingram's observations (antea, pp. 12-13) I have asked Major Boyd, who has given particular attention to the subject, to record his experiences. It is clear that, a t any rate on some waters, actual robbing of food brought up by divi...

Feeding Habits of the Black-headed Gull

01 June 1944 Comments Main paper THE regular habit of Black-headed Gulls (Larus r. ridibundus), amongst other species, of hawking flying ants when these insects take their nuptial flights in summer, is well known, but I do not remember having seen any reference to the height to which the...

The Inner Territory of the Black-Headed Gull

01 October 1940 Comments Main paper THE present writer in a book--Bird Behaviour--made a statement to the effect that " the territory of a Black-headed Gull (L. ridibundus) has no fixed boundary : it may react to an intruder at a distance of two feet or less, or at two yards or more " (p. 3...

Letters

01 October 1934 Comments Letters SIRS,--Mr. R. L. Brown, in his interesting notes on the Kingfisher (antea, p. 83), reports a pair of birds having a clutch several days incubated when they had at the same time a brood in an adjacent nest. The experience especially interested me because t...