Table 2. Macroscopic and microscopic observations in WTEs subjected to necropsy.

WTE no.*	Gender	HPAIV subtype	Observation	Macroscopic finding	Histological analysis	In situ hybridization
4	Male	H5N1	Observed alive exhibiting neurological symptoms and had difficulties flying; later found dead	Hyperaemic skin around eyes and beak; empty gizzard and intestines	Mild, multifocal lymphocytic and histiocytic myocarditis; multifocal splenic necrosis	Positive signal in splenic necroses; few neurons positive in the brain
6	Female	H5N5	Observed alive, exhibiting abnormal behaviour, not able to fly; euthanized	Weight 5.5 kg;sparse content in gizzard	Mild, multifocal lymphocytic and histiocytic myocarditis; multifocal splenic necrosis; mild encephalitis	Few neurons positive in the brain
8	Unknown	H5N1	Found dead	Weight 6.5 kg; dark red lungs; empty gizzard; sparse content in intestines	Multifocal to coalescing myocardial necrosis; mild encephalitis	Positive signal in necrosis, myocytes and vessels in the heart; strong positive signal in neurons and vessels in the brain
12	Female	H5N5	Found dead, with gunshot wounds	Haemorrhages and perforations in muscles related to trauma; empty gizzard	Mild, multifocal lymphocytic and histiocytic myocarditis; multifocal splenic necrosis; mild encephalitis	Analysis not performed

^*The WTE no. relates to the numbering in Table S1.