ASPECTS OF POPULATION BIOLOGY OF THE EASTERN SPINEBILL Acanthorhynchus tenuirostris (Meliphagidae) IN NEW ENGLAND NATIONAL PARK, NSW
| Posted: |
22/09/2021 |
| Author(s): |
David C. McFarland, Hugh Ford |
Nearly 3 000 Eastern Spinebills have been banded in New England National Park
since 1977. The number of birds caught each year was greatest in winter (April-September)
when two Banksia species were in flower. Each year there was a number of peaks in birds
captured. possibly due to successive invasions of either different spinebill populations or
different parts of the same population. A total of 134 (5.2%) birds were recaptured in a
subsequent year, often in the same month that they were banded. The oldest bird was at
least 8 years old, and survival was estimated to be 60% per year. During the year the
sex ratio of the population changed, with males outnumbering females in most months
but particularly so in March, July and August.
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