Abstract
In 1981 high mortality (death) rates of fledgling budgerigars (Melopsittacus undulatus) were reported both in Ontario (1) and in Texas and Georgia aviaries (5). Mortality occurred in birds approximately 1 day to 3 weeks old (1,5). Affected birds exhibited distended abdomens and reddening of the skin (5). Feather abnormalities were also observed by Bernier et al. (1). Changes included 1) lack of down feathers on the back and abdomen, 2) lack of filoplumes on the head and neck, and 3) retarded growth of the tail and contour feathers. Many fledgling birds were found with full crops and appeared to die acutely (5). Those birds that survived...References
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