Heermann's Gull
Heermann's GullHeermann's GullHeermann's GullHeermann's Gull

Heermann's Gull

Larus heermanni

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Insufficient data
overall probability at Great Bear Rainforest
2 Verified records at Great Bear Rainforest
☀️ Diurnal When it's active during daytime hours (6am–6pm)

Heermann's gull (Larus heermanni) is a gull resident in the United States, Mexico and extreme southwestern British Columbia, nearly all nesting on Isla Rasa in the Gulf of California. They are usually found near shores or well out to sea, very rarely inland. The species is named after Adolphus Lewis Heermann, nineteenth-century explorer and naturalist. Wikipedia →

Closest Relatives at Great Bear Rainforest

Glaucous-winged Gull
LC

Glaucous-winged Gull

☀️ Diurnal Bird

Larus glaucescens

40–50% · Likely
Short-billed Gull

Short-billed Gull

☀️ Diurnal Bird

Larus brachyrhynchus

30–40% · Possible
California Gull
LC

California Gull

☀️ Diurnal Bird

Larus californicus

10–20% · With luck
American Herring Gull
LC

American Herring Gull

☀️ Diurnal Bird

Larus smithsonianus

10–20% · With luck
Iceland Gull
LC

Iceland Gull

☀️ Diurnal Bird

Larus glaucoides

5–10% · With luck
Ring-billed Gull
LC

Ring-billed Gull

☀️ Diurnal Bird

Larus delawarensis

<5% · Rare
Western Gull
LC

Western Gull

☀️ Diurnal Bird

Larus occidentalis

<5% · Rare
Glaucous Gull
LC

Glaucous Gull

☀️ Diurnal Bird

Larus hyperboreus

<5% · Rare
Bonaparte's Gull

Bonaparte's Gull

☀️ Diurnal Bird

Chroicocephalus philadelphia

10–20% · With luck
Little Gull
LC

Little Gull

☀️ Diurnal Bird

Hydrocoloeus minutus

Insufficient data
Caspian Tern
LC

Caspian Tern

☀️ Diurnal Bird

Hydroprogne caspia

<5% · Rare
Black-legged Kittiwake
VU

Black-legged Kittiwake

☀️ Diurnal Bird

Rissa tridactyla

<5% · Rare

📅 Monthly Probability

📊

Fewer than 5 records of Heermann's Gull at Great Bear Rainforest — not enough to chart months honestly.

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Channel Islands National Park 🇺🇸 United States
20–30%
2 El Vizcaíno Biosphere Reserve 🇲🇽 Mexico
20–30%
3 Bahía de Loreto National Park 🇲🇽 Mexico
20–30%
4 Olympic National Park 🇺🇸 United States
5–10%
5 Redwood National Park 🇺🇸 United States
5–10%
6 Pacific Rim National Park Reserve 🇨🇦 Canada
<5%
7 Carara National Park 🇨🇷 Costa Rica
Insufficient data
8 Joshua Tree National Park 🇺🇸 United States
Insufficient data
9 Great Bear Rainforest 🇨🇦 Canada
Insufficient data
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