Mantle - Bird Anatomy

Marsh Wren

Nigel/Flickr/CC by 2.0

What Is a Bird's Mantle?

(noun) The mantle is the area of a bird's upperparts between the base of its nape and its rump, between the shoulders and along the spine. In general, the mantle is only the upper part of the back.

Pronunciation

MAAN-tuhl
(rhymes with "ant hill" "pant will" and "rant mill")

Mantle Position

While the term mantle refers generally to a bird's back, more detailed ornithological texts may consider the mantle only the upper part of the back rather than the entire length from the neck to the rump. For most birders, however, the term mantle is understood to refer to the overall back, with emphasis close to the bird's neck where more of the back is visible and not covered by the wings. Many times the overall color or markings of the mantle will blend with the bird's scapulars, wings, or rump, but close examination of feather size and orientation can distinguish the boundaries of the mantle. That intimate of examination is often only possible, however, if the bird is held in the hand, as in when a bird is being banded or an injured bird is being rehabilitated.

One human definition of a mantle is a cloak, stole, or shawl, and picturing that article of clothing can help define a bird's mantle. A shawl is worn across the shoulders and down the back, often falling to a point, and that is just the shape of a bird's mantle.

What a Mantle Isn't

There are several other body parts that could be confused with the mantle, depending on how the bird is viewed. By recognizing the differences between these parts, birders will be able to more clearly recognize the mantle.

  • Hindneck: This is the back of the neck, but does not continue down between the shoulders where the mantle is located.
  • Nape: This is the back of a bird's head, and while in some cases the coloration of the nape can continue down the hindneck, it is distinct from the mantle.
  • Uppertail Coverts: These are the feathers that cover the base of the bird's tail at the very bottom of the back and over the rump, lower than the mantle's location.
  • Rump: This is the part of a bird's back that is right above the tail, and when viewed in profile, is behind the legs. The mantle is much higher on the body.
  • Wingpit: The wingpit is the area underneath where the wings join the body, the equivalent to a human's armpit. The mantle is entirely above the bird's wings.

How Birds Use Their Mantles

A bird's mantle can be a key part of their anatomy and useful for many things. On some birds, the mantle is a distinct color that is prominently displayed for courtship or to demonstrate aggression, or even just instrumental for birds to recognize others of the same species. Birds may also turn their back toward the sun and raise their feathers to allow sunlight to reach their skin when sunning, which helps regulate body temperature and warm the bird on cold days, since the mantle is a broad part of the body and can absorb more sunlight and warmth.

Many birds of prey also practice mantling, where they hunch over their prey to conceal it from other raptors, scavengers, or predators. This position, with the wings drooped, shoulders hunched, and neck dropped, is when the mantle is most visible.

The Mantle as a Field Mark

Birders can use the mantle as a key field mark for many species. Not only is the color of the mantle important for proper bird identification, but there may be outstanding features such as streaks, bars, stripes, spots, flecks, scallops, or other markings on the mantle that can distinguish between species. The size, color, and arrangement of the markings can be useful for identification, as well as how much the mantle contrasts with the adjacent edges of the nape, wings, or rump.

For some species, the mantle is such a diagnostic field mark that it becomes part of the bird's name, such as the crimson-mantled woodpecker, yellow-mantled weaver, golden mantled racquet-tail, red-backed thrush, chestnut-backed chickadee, and the orange-backed troupial. With these birds, just seeing the mantle, even if the rest of the view of the bird is not clear, can be enough for confident identification.

Also Known As

Back, Upper Back