Indri indri (Babakoto) : 無料・フリー素材/写真
Indri indri (Babakoto) / wallygrom
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Perinet Reserve (Andasibe-Mantadia National Park) in eastern Madagascar.We got up very early to go hear ... and see ... the Indris. We heard them long before we saw them ... their call is loud, and haunting.The indri (Indri indri), also called the babakoto, is one of the largest living lemurs, with a head-body length of about 64 - 72 cm (25 - 30 in) and a weight of between 6 and 9.5 kg (13 and 21 lb). It has a black and white coat and maintains an upright posture when climbing or clinging. It is monogamous and lives in small family groups, moving through the canopy. They are herbivorous, feeding mainly on leaves but also seeds, fruits, and flowers. The groups are quite vocal, communicating with other groups by singing, roaring and other vocalisations. Besides humans, it is the only mammal found that can use rhythm.It is a diurnal tree-dweller related to the sifakas and, like all lemurs, it is native to Madagascar. It is revered by the Malagasy people and plays an important part in their myths and legends with various stories in existence accounting for its origin. The main threats faced by the indri are habitat destruction and fragmentation due to slash and burn agriculture, fuelwood gathering, and logging. It is also hunted despite taboos against this. The International Union for Conservation of Nature has rated its conservation status as Critically Endangered.Across Madagascar, the indri is revered and protected by fady (taboos). Countless variations are given on the legend of the indri's origins, but they all treat it as a sacred animal, not to be hunted or harmed.The indri makes loud, distinctive songs, which can last from 45 seconds to more than 3 minutes. Song duration and structure varies among and even within groups, but most songs have the following three-phase pattern.Different indri groups typically sing sequentially, responding to one another. As well as solidifying contacts between groups, the songs may communicate territorial defense and boundaries, environmental conditions, reproductive potential of the group members, and warning signals. The indri may sing after disturbances such as thunder, airplanes, bird calls, and other lemur calls. A group will sing almost every day, up to seven times daily. The peak singing hours are between 7 and 11 am. Daily frequency of song is highest during the indri's breeding season from December to March.Several other indri vocalizations have been identified. The "roar" is also used as a warning signal for aerial predators such as hawks. The indri emit a "hoot" or "honk" to warn of terrestrial predators such as the fossa. Other vocal categories include the "grunt", "kiss", "wheeze", and "hum". The purpose of these is not well understood.Before singing, the indri move to the tree tops, which allows them to be heard up to 4 km away. |
| 撮影日 | 2000-10-27 00:00:05 |
| 撮影者 | wallygrom |
| タグ | |
| 撮影地 | Perinet, Toamasina, Madagascar 地図 |