Hartlaub's Gull (Chroicocephalus hartlaubii) [XC358270]
by Peter Boesman from Walvis Bay, Erongo Region, Namibia (call)
Hartlaub's Gull (Chroicocephalus hartlaubii) [XC392385]
by Peter Boesman from Paarl Bird Sanctuary, Paarl, Western Cape, South Africa (call)
Subspecies
Silver Gull (Larus novaehollandiae) and Hartlaub's Gull (Larus hartlaubii), cross-regional species, and Red-billed Gull (Larus scopulinus), a New Zealand endemic (Sibley and Monroe 1990, 1993), are retained as separate species contra Turbott (1990) who include scopulinus and hartlaubi as subspecies of Silver Gull (Larus novaehollandiae), pending revision of the New Zealand CheckList.
Forms superspecies with Silver Gull (Larus novaehollandiae) and Red-billed Gull (Larus scopulinus). Often treated as a subspecies of Silver Gull (Larus novaehollandiae).