SEASONAL VARIATION IN HEAD-BILL LENGTH FOR THE EASTERN SPINEBILL Acanthorhynchus tenuirostris AT BARREN GROUNDS NATURE RESERVE, NEW SOUTH WALES
| Posted: |
23/09/2021 |
| Author(s): |
Richard Jordan |
Head-bill length (HB) was measured for all Eastern Sp1nebills captured at Barren Grounds Nature
Reserve over a 16-month period. HB for adult males was always greater than for adult females at
any given time of the year. Mean HB for both males and females showed a seasonal variation. There
was a maximum in midwinter and a minimum in midsummer. Four individuals recaptured on several
occasions over the same period showed a similar variation in HB.
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