Assertion: pigeon's bird | /r/CapableOf | store trace metals
Facets:
value: in their feathers
type: LOCATION
value: due to their higher concentrations of melanin
type: CAUSE
Source sentences:
text: Darker birds may be better able to store trace metals in their feathers due to their higher concentrations of melanin, which may help mitigate the negative effects of the metals, the concentrations of which are typically higher in urban areas.