The eyes, gular skin and face are dark.

Their eyes are grey and their bills and gular skin range from black to orange.

Its legs and feet are black and its gular skin blackish.

In cormorants, the gular skin is often colored, contrasting with the otherwise plain black or black-and-white appearance of the bird.

The bill is yellow, shading to orange toward the base, the gular skin is a vibrant orange or red.

The throat has a light dusting of melanophores and the vocal sac is black and visible through the gular skin.

This species has dark-colored plumage with bare super-loral skin and gular skin that is yellow or orange.

Its gular skin is a deep orangey yellow; unusually for a cormorant, its lores are feathered.

In many species, the gular skin forms a flap, or gular pouch, which is generally used to store fish and other prey while hunting.

In the non-breeding bird or juvenile, the plumage is brownish and the bill and gular skin can appear more fleshy.

Gular skin can be very prominent, for example in members of the order Phalacrocoraciformes as well as in pelicans (which likely share a common ancestor).

They lack the white filoplumes, the wing coverts appear less silvery, but more dark grey, and the bill and gular skin are duller in coloration.

In frigatebirds, the gular skin (or gular sac or throat sac) is used dramatically.

Gular skin (throat skin), in ornithology, is an area of featherless skin on birds that joins the lower mandible of the beak (or bill) to the bird's neck.

Many species have areas of coloured skin on the face (the lores and the gular skin) which can be bright blue, orange, red or yellow, typically becoming more brightly coloured in the breeding season.

As members of Pelecaniformes, frigatebirds have the key characteristics of all four toes being connected by the web, a gular sac (also called gular skin), and a furcula that is fused to the breastbone.

Though desert birds lack sweat glands, they can still take advantage of evaporative cooling by panting, which cools the trachea and lungs, and gular flapping, which consists of rapidly fluttering the gular skin to move air over the inner mouth and throat.