Publication

SEASONAL VARIATION IN HEAD-BILL LENGTH FOR THE EASTERN SPINEBILL Acanthorhynchus tenuirostris AT BARREN GROUNDS NATURE RESERVE, NEW SOUTH WALES


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.

>> Download Abstract | File Size: 208 KB
>> Download Complete PDF | File Size: 556 KB