موسوعة الككتوه الأسود ذي الذيل الأبيض (Zanda baudinii)

المواصفات العامة :

لون الشعر في منطقة الأذن أبيض ورمادي ، ولون الريش تحت الذيل أبيض مخلوط برمادي غامق ولون الريش في منطقة تحت الرقبة الممتدة رمادي مخلوط بالأسود في طرف الريش وهذه الصفة هى صفة بارزة في تقسيمه

موطن العيش و :

The White Tailed Black Cockatoo is the sub species of the Black Cockatoo. It lives in the southwest and the southeast of Australia. HABITAT AND ECOLOGY Restricted to moist, heavily forested areas dominated by marri Eucalyptus calophylla, karri E. diversicolor and jarrah E. marginata. Its overall non-breeding range may be determined by distribution of marri, though it does occur in apple and pear orchards and occasionally in wandoo E. wandoo woodland (Higgins 1999). The species mainly feeds on the seeds and flowers of marri, as well as the seeds of Banksia, Hakea and Dryandra species, Erodium botrys and jarrah, and additionally takes insect larvae (DEC, Western Australia 2007a). It also feeds on apple and pear seeds (DEC, Western Australia 2007a) and is considered a pest owing to the damage it causes when extracting seeds from crops in commercial orchards (Chapman 2007, DEC, Western Australia 2007a). Damage to commercial fruit crops is thought to be higher during local or seasonal shortages of marri seeds, and could be related to destruction of this habitat (DEC, Western Australia 2007a). The species may live for 25 to 50 years in the wild (DEC, Western Australia 2007a). It breeds in large hollows of old karri, marri and jarrah (Higgins 1999, DEC, Western Australia 2007a) within heavily forested areas (Higgins 1999), although recent work suggests that there are very few nest sites, that breeding occurs very infrequently and that many nest hollows are being taken over by feral bees (P. Mawson in litt. 2004). Breeding data has indicated that pairs raise, on average, 0.6 chicks each year. In years of poor marri seed production, the population may fail to raise any young at all (DEC, Western Australia 2007a). The species has a strong association with very large (greater than 1.5m diameter) and old (230-300 years) marri trees, which may exacerbate declines (P. Mawson in litt. 2004).

السلوك :

مدة تفقيس البيض مثل الككتوه الأسود الآخر هى حوالي 30 يوم

Reference :

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