In the study, photographs and video showed the Sumba Boobook with dark-brown irises. Field observations found it mainly at forest edges and in mangroves, though it also crossed open areas.
The paper records dark-brown irises in its photographs and video.
During repeated visits, the owls were observed mainly at forest edges and in mangroves. They were not confined to forest and also flew across open areas, perching in isolated trees.
An extinction-risk assessment has not been added yet.