Colony Name
    
          Tongatapu Island
    
      Atoll
    
          Tongatapu Group
    
      EEZ
    
          Tongan EEZ
    
      Island Name
    
          Tongatabu
    
      Local Island Name
    
          New Amsterdam
    
      Coordinates
    
          
    21° 10.5' S,
    175° 11.4' W
  
| Species | Period | Count | Derivation | Breeding Status | Data Source | Data Quality | 
|---|---|---|---|---|---|---|
| 1992  January (Breeding) | 10-20 Individuals | Observed | Confirmed | Good | ||
| 1991  November (Breeding) | 15 Individuals | Observed | Confirmed | Medium | ||
| 1988  July (Unknown) | (Common) | Data Deficient | Poor | |||
| 1988  July (Unknown) | (Frequent) | Data Deficient | Poor | |||
| 1986  October (Unknown) | (Present) | Data Deficient | Poor | |||
| 1986  October (Unknown) | 3 Individuals | Observed | Data Deficient | Good | ||
| 1974 | (Frequent) | Data Deficient | Poor | |||
| 1974 | (Common) | Probable | Poor | |||
| 1974 | (Frequent) | Data Deficient | Poor | |||
| 1974  April (Unknown) | 1 Individuals | Observed | Data Deficient | Good | ||