Usually considered conspecific with T. aethiopicus; differs in whitish or pale blue vs dark brown iris (3); reduced or non-existent black tips on wings (2); bluish-slate vs purplish-slate tertials (1); and differently structured ornamental neck-sacs and different display (2)#R. Also closely related to T. melanocephalus and T. moluccus, and in past all were occasionally considered conspecific. Two subspecies recognized.
Food and feeding
Status and conservation
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