| 词条 | African green pigeon |
| 释义 |
| name = African green pigeon | image =African Green-Pigeon (Treron calvus).jpg | image_caption = T. c. delalandii in the Kruger Park | status = LC | status_system = IUCN3.1 | status_ref = [1] | genus = Treron | species = calvus | authority = (Temminck, 1811) | synonyms = }} The African green pigeon (Treron calvus) is a species of bird in the family Columbidae, and one of 5 green pigeon species in the Afrotropics. The species has a wide range in Sub-Saharan Africa with around 17 accepted races.[2] DescriptionAdult birds have maroon shoulder patches (olive in immatures) and rufous undertail coverts. They reach a length of 25–28 cm. RangeThey may occur and breed in high densities but are prone to regular local movements. Their range includes Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Republic of the Congo, Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Nigeria, Rwanda, São Tomé and Príncipe, Senegal, Sierra Leone, Somalia, South Africa, South Sudan, Swaziland, Tanzania, Togo, Uganda, Zambia and Zimbabwe. HabitsAs with others in their genus, they frequent tree canopies where their parrot-like climbing ability[3] enable them to reach fruit, but rarely also forage on the ground. Their call is a series of flowing whistles, rendered as ‘thweeeloo, thweeeoo’. They inhabit riparian forest, woodland and savanna, where they associate with fruiting trees, especially wild fig (Ficus) species, including Ficus sycomorus and Ficus sur, and in cities the ornamental Chinese banyan. They also take fruit of Saffrons (Cassine spp.), Jacket plum (Pappea capensis), Buffalo thorn (Ziziphus mucronata), Water berry (Syzygium cordatum) and Jackalberry (Diospyros mespiliformis). They may also feed on exotic Loquats and Mulberries, or on carrion by occasion. NestingThey nest in a tree fork that offers an adequate vantage point of their surrounds. The nest is a weak platform of sticks, collected by the male and arranged by the female.[4] Nesting may take place in any month of the year, though mostly in summer. 1-2 eggs are laid that hatch in 13–14 days. Chicks leave the nest at about 12 days. PicturesReferences1. ^{{IUCN|id=22691218 |title=Treron calvus |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} 2. ^{{cite web|title=African Green-pigeon (Treron calva) |url=http://ibc.lynxeds.com/species/african-green-pigeon-treron-calva |work=Internet Bird Collection |publisher=Lynx Edicions |accessdate=22 October 2012}} 3. ^Gerhard Rösler: Die Wildtauben der Erde – Freileben, Haltung und Zucht, Verlag M. & H. Schaper, Alfeld-Hannover 1996, {{ISBN|3-7944-0184-0}} 4. ^Video of nesting behaviour, The Internet Bird Collection External links
6 : Treron|Birds of the Gulf of Guinea|Birds of Africa|Birds of Sub-Saharan Africa|Birds described in 1811|Taxonomy articles created by Polbot |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。