Great Northern Loons (Gavia immer) frequent the lower reaches of tidal creeks of all Refuge Divisions from late autumn through early spring.

It is said to be similar to a great northern diver, but with white markings and the ability to roar.

The Great Northern Diver spotted at the reservoir, for example?

Its call is an eerie wailing, lower pitched than Great Northern Diver.

Breeding adults are like a smaller sleeker version of Great Northern Diver.

'Possible great northern diver': more excitement.

The Common Loon or Great Northern Diver is a bird.

We may also spot Rock Ptarmigans, and Great Northern Divers at sea.

Great northern divers, having spent the winter singly in many of the Shetland voes, gather in parties and are joined by birds from further south.

Arctic Hares are usually seen here, and there is a lake with Great Northern Divers and their young.

Further out, around the shores of Berneray, are mallards, eiders, red-breasted mergansers, and, more rarely, black-throated and great northern divers.

The question arises whether it is a Great Northern Diver, which has never been known to nest in the British Isles, or a Black-Throated Diver.

Studland Bay is particularly good for sighting rarer grebes and divers in winter, with up to 20 Black-necked Grebe and 5 Great Northern Diver recorded.

Species of birds which breed in the park include great northern diver, barnacle goose, pink-footed goose, common eider, king eider, gyrfalcon, snowy owl, sanderling, ptarmigan and raven.

Great Northern Diver and Jack Snipe are winter visitors, and in summer Cuckoo, Whinchat, Whitethroat and Twite breed on the island.

Other common waterbirds include the Slavonian Grebe, Red-necked Phalarope, Great Northern Diver, Red-throated Diver and Whooper Swan.

Birds seen at the site include Little Owl, Little Grebe, Great Northern Diver, Eurasian Oystercatcher, Common Tern and breeding Common Redshank.

The species is known as the Common Loon in North America and the Great Northern Diver in Eurasia; its current name is a compromise proposed by the International Ornithological Committee.

Traveling in the winter, look for Lesser Scaup, Blue-winged Teal, Mottled Ducks, Great Northern Divers, Laughing Gulls, American White Pelicans, and Red-breasted Mergansers.

If you listen carefully to the sound-tracks of old Tarzan movies, you will hear the sounds of animals from Africa, Asia and South America all mixed together - with a liberal sprinkling of great northern diver!

In the winter of 1865, Irish ichthyologist Harry Blake-Knox claimed to have seen a thresher shark in Dublin Bay use its tail to strike a wounded loon (probably a great northern diver, Gavia immer), which it then swallowed.

U.S. Agent Gavia Immer (sharing a name with the common loon) is stationed by the U.S. military in a cabin in the woods of the Quabbin Reservoir in Massachusetts.

The name refers to the Minnesota state bird, the Common Loon (Gavia immer).

(A Gavia immer at the Reservoir.)

Great Northern Loon (Gavia immer)

The Great Northern Loon (Gavia immer), is a large member of the loon, or diver, family of birds.

Great Northern Loons (Gavia immer) frequent the lower reaches of tidal creeks of all Refuge Divisions from late autumn through early spring.

However, one exceptionally large North American Common Loon (Gavia immer), weighed 8 kg (17.6 lb), heavier than any recorded Yellow-billed Loon.

This Upland area is home to waterfowl, such as the common loon (Gavia immer), red-breasted merganser (Mergus serrator), as well as other ducks, and geese on the many lakes of the region.

U.S. Agent Gavia Immer (sharing a name with the common loon) is stationed by the U.S. military in a cabin in the woods of the Quabbin Reservoir in Massachusetts.

In the winter of 1865, Irish ichthyologist Harry Blake-Knox claimed to have seen a thresher shark in Dublin Bay use its tail to strike a wounded loon (probably a great northern diver, Gavia immer), which it then swallowed.

In terms of limb length, shape of the hip bones, and position of the hip socket, Hesperornis is particularly similar to the Great Northern Loon (Gavia immer), probably exhibiting a very similar manner of locomotion on land and in water.