FLEDGING SUCCESS OF EGRETS IN DRY AND WET SEASONS
| Posted: |
25/09/2021 |
| Author(s): |
Max Maddock |
Fledging success for Great, Little and lntermediate Egrets at a breeding colony at
Shortland (Newcastle, N.S.W.) was found to increase significantly between the wet 1982-1983
and the dry 1983-1984 breeding seasons, whereas for Cattle Egrets there was no significant
difference. Evidence of diet changes obtained during the 1984-1985 drought season,
coupled with observations of behaviour in the colony during breeding seasons, suggest the
hypothesis that the relationship between seasonal food availability and lethal aggression
between siblings is the critical factor at work in determining breeding success.
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