Question: Are the Norfolk Robin's a different species or are they same? use evidence to support your claim

use this and the picture to help

The scientists decided to compare genetic similarities of Norfolk Island (NI) robins (for the alleles of ND2 gene) to each of these populations of robins.  
Red-capped Robin (different species): 98.2% similar to the NI robins
Pacific Robins (population we want to know about): 96.7% similar to the NI robins
Scarlet Robins (different species): 88.7% similar to the NI robins
The chart below shows the average wing length of the different populations of robins:
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