This flowerpecker has been collected and recorded on Makira in the Solomon Islands. A study describes its plumage as dull brown and says males and females do not show marked color differences.
The study describes Dicaeum tristrami from Makira as dull brown, with no marked sexual dichromatism.
The Solomon Islands forest guide says this species is common in disturbed forest and forest edges on Makira, and is most common in montane areas.
An extinction-risk assessment has not been added yet.