Gliding ant

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A Cephalotes atratus, one of the several species that display this ability. Gliding is provided by specific adaptations such as the flattened head. Cephalotes Atratus.jpg
A Cephalotes atratus, one of the several species that display this ability. Gliding is provided by specific adaptations such as the flattened head.

Gliding ants are arboreal ants of several different genera that are able to control the direction of their descent when falling from a tree. Living in the rainforest canopy like many other gliders, gliding ants use their gliding to return to the trunk of the tree they live on should they fall or be knocked off a branch. Gliding was first discovered for Cephalotes atratus in the Peruvian rainforest.

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At least five genera in the subfamilies Myrmicinae, Pseudomyrmecinae, and Formicinae (mostly Camponotus ) display gliding of various degrees, in an example of parallel evolution. All species in the genus Cephalotes (within Myrmicinae) tested to date show this ability, as do many species within Pseudomyrmecinae. Unique among gliding animals, Cephalotes (Myrminae) and Pseudomyrmecinae ants glide abdomen first. Formicinae ants glide in the more conventional head first manner, though.

Gliding ants have been shown to have an 85%" [1] chance of landing successfully on the same tree, as opposed to 5% if they were simply parachuting like normal ants. This adaptation helps to keep ants from getting lost or killed on the forest floor, away from their treetop nests. During a fall, gliding ants use visual cues to locate tree trunks. Specifically, they orient to light-colored columnar objects that sharply contrast the darker background of foliage in the forest. Tropical trees often have light-coloured bark and frequently are covered with white lichens, thus they provide the most conspicuous targets.

In a typical fall a descent by a gliding ant is "J-shaped". [2] The ant will first randomly descend 3 or 4 metres (10 or 13 ft) in free fall, then visually lock on to the tree trunk it wishes to land on. The glide ant then, while exhibiting a sort of parachuting behaviour to slow its fall, uses its flattened head, hind legs and abdomen like wings or a parachute to make a rapid adjustment to point its abdomen [2] (or head) towards the tree trunk. The ant then turns upside down and lands on the trunk, head facing the earth. [2] The period of free fall is thought to be used by the ants to slow down to a minimum viable glide velocity, to allow them to successfully direct their descent towards the tree. This explains why smaller ants have been observed to reach their trees sooner than do larger ants. A smaller body mass makes it easier to slow to the minimum viable glide velocity, allowing smaller ants to gain control of their falls more quickly. Many ants use long, flattened legs and wide, flanged heads to act as parachutes to control the direction of their descent, although controlled descent has also been observed in species of Pseudomyrmecinae that have more cylindrical bodies.

Gliding is not observed in all arboreal ants. Some characteristics that may be evolutionarily correlated with gliding are:

See also

Related Research Articles

<span class="mw-page-title-main">Flying and gliding animals</span> Animals that have evolved aerial locomotion

A number of animals are capable of aerial locomotion, either by powered flight or by gliding. This trait has appeared by evolution many times, without any single common ancestor. Flight has evolved at least four times in separate animals: insects, pterosaurs, birds, and bats. Gliding has evolved on many more occasions. Usually the development is to aid canopy animals in getting from tree to tree, although there are other possibilities. Gliding, in particular, has evolved among rainforest animals, especially in the rainforests in Asia where the trees are tall and widely spaced. Several species of aquatic animals, and a few amphibians and reptiles have also evolved this gliding flight ability, typically as a means of evading predators.

<i>Cephalotes atratus</i> Species of ant

Cephalotes atratus is a species of arboreal ant in the genus Cephalotes, a genus characterized by its odd shaped head. These ants are known as gliding ants because of their ability to "parachute" by steering their fall if they lose their footing.

<i>Cephalotes coffeae</i> Species of ant

Cephalotes coffeae is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head, and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes eduarduli</i> Species of ant


Cephalotes eduarduli is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes goeldii</i> Species of ant

Cephalotes goeldii is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes grandinosus</i> Species of ant

Cephalotes grandinosus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop from the tree they are on, giving their name also as gliding ants.

<i>Cephalotes incertus</i> Species of ant

Cephalotes incertus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes oculatus</i> Species of ant

Cephalotes oculatus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes pallidoides</i> Species of ant

Cephalotes pallidoides is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes peruviensis</i> Species of ant

Cephalotes peruviensis is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants. They can be found in Peru, Costa Rica, and the Osa Peninsula.

<i>Cephalotes pinelii</i> Species of ant

Cephalotes pinelii is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes poinari is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes spinosus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes umbraculatus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of a tree. They are also known as gliding ants.

<i>Cephalotes angustus</i> Species of ant

Cephalotes angustus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes basalis is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes columbicus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes decoloratus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

Cephalotes trichophorus is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they're on. Giving their name also as gliding ants.

<i>Cephalotes varians</i> Species of ant

Cephalotes varians is a species of arboreal ant of the genus Cephalotes, characterized by an odd shaped head and the ability to "parachute" by steering their fall if they drop off of the tree they are on. This ability makes them one of several species known as gliding ants.

References

  1. Yanoviak S. P., and Dudley, R. "The role of visual cues in directed aerial descent of Cephalotes atratus workers (Hymenoptera: Formicidae). Archived 2008-07-25 at the Wayback Machine " Journal of Experimental Biology. Vol. 209, 1177-1783. April 18, 2006. Accessed 2009-06-08.
  2. 1 2 3 Dudley, R., Byrnes, G., Yanoviak S.P., Borrell, B., Brown, R.M., and McGuire, J.A. "Gliding and the Functional Origins of Flight: Biomechanical Novelty or Necessity?. Archived 2011-01-12 at the Wayback Machine " Annual Review of Ecology, Evolution, and Systematics. Vol. 38, 179-201. December, 2007. Accessed 2009-06-08.

Further reading