Black-legged Kittiwake (Rissa tridactyla) – Rare visitor, mostly in late fall and winter after Pacific storms; seen at large reservoirs and lakes.
Ivory Gull (Pagophila eburnea) – Extremely rare Arctic stray, with only a handful of state records, usually after severe winter weather.
Sabine’s Gull (Xema sabini) – Uncommon but regular in migration, especially in fall; juveniles more often recorded than adults.
Little Gull (Hydrocoloeus minutus) – Rare migrant and winter visitor, usually found among Bonaparte’s Gulls at reservoirs.
Laughing Gull (Leucophaeus atricilla) – Scarce visitor, mostly in spring and summer; some records associated with hurricanes or tropical storms.
Heermann’s Gull (Larus heermanni) – Rare inland wanderer from Pacific coasts, typically in late summer to fall.
Heermann's Gull
Short-billed Gull (Larus brachyrhynchus) – Rare winter visitor, often detected among Ring-billed Gulls at large lakes.
Short-billed Gull
Western Gull (Larus occidentalis) – Very rare inland occurrence; usually single individuals in winter or early spring.
Yellow-footed Gull (Larus livens) – Casual visitor from the Gulf of California; recorded mainly in late summer and fall.
Yellow-footed Gull
California Gull (Larus californicus) – Uncommon migrant and winter visitor, more frequent in northern Arizona reservoirs.
Herring Gull (Larus argentatus) – Rare but regular in winter at large lakes; both adults and immatures observed.
Iceland Gull (Larus glaucoides) – Very rare winter visitor, typically juveniles; often found among mixed gull flocks.
Lesser Black-backed Gull (Larus fuscus) – Increasingly recorded in winter, usually single birds among Ring-billed Gulls.
Glaucous Gull (Larus hyperboreus) – Rare winter visitor from the Arctic; mostly immature plumages recorded.
Glaucous-winged Gull (Larus glaucescens) – Rare winter occurrence; often hybridizes with Western Gull in its range, making identification challenging.