Threats to the black robin
Chatham Island black robin
fledglings in nest
Predation
By 1900, the introduction of rats and cats following human settlement had wiped out the birds from everywhere apart from Little Mangere Island. The accidental introduction of predators to the two islands where it presently survives is still a threat.
Disease
All black robins have the same weaknesses and strengths, stemming from the fact they have similar DNA. This means that a single disease could kill them.