Meteorological conditions and Cattle Egret migration: an updateSubmitted by osnz-admin on Tue, 03/15/2011 - 22:42
|Title||Meteorological conditions and Cattle Egret migration: an update|
|Publication Type||Journal Article|
|Year of Publication||1994|
|Authors||Bridgman, HA, Maddock, M|
|Type of Article||paper|
|Keywords||Australia, Cattle Egret, meteorology, migration, New Zealand|
The migration pattern of Cattle Egrets in 1990 and 1991 and its relation to meteorology are presented to extend initial results covering 1987-1989 (Maddock & Bridgman 1992). Cattle Egrets migrated to Victoria and Tasmania in waves during March and April in northerly air flow (western side of a high pressure system) in a series of stages, with periods of rest in between. Major staging points seemed to be Windsor (NSW), Nowra (NSW), and Baimsdale (Vic). Return migrations (October and November) appeared faster, with fewer and shorter rest stops, and were in southerly airflow. Staging points were Werribee (Vic), Nowra (NSW), and Wyong (NSW). Migrations to and from New Zealand were much more limited than in previous years due to adverse weather conditions, especially winds.