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The breeding biology of the Intermediate Egret. Part 1: the physical and behavioural development of the chick, with special reference to sibling aggression and food intake.

Category: Issue 5
Author(s): McKilligan
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The development and behaviour of marked chicks in two broods of the Intermediate Egret Egretta intermedia plumifera are described. Incubation was 26 (±1)days, the chicks flew at six and seven weeks old, and were fed at the nest until about ten weeks, when they left the heronry. The rate of food bolus delivery to the […]

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Wing length, wingspan and body length measurements of live birds at banding stations.

Category: Issue 5
Author(s): John Liddy
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Aspects of wing length, wingspan and body length measurements of live birds at banding stations are reviewed, using as examples data from a banding station at Cowiebank, southeastern Queensland. The histogram of the extended length measurement is a useful tool for sexing some morphometric species, and its use at banding stations is recommended: it has […]

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The use of feather abrasion in moult studies.

Category: Issue 5
Author(s): Rogers
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Four stages of feather abrasion have been defined for fully grown feathers; they can be recognized in the remiges, rectrices, and primary and secondary coverts of most birds. A code is given for each abrasion stage, allowing abrasion to be recorded in conventional moult formulae. Systematic recording of abrasion condition may help establish when moult […]

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