BIRDWALKERMONDAY

Thursday, 13 June 2019

2-6-2019 LINYANTI CAMP, BOTSWANA - COMMON IMPALA (MALE) (Aepyceros melampus ssp. melampus)

The impala (Aepyceros melampus) is a medium-sized antelope that is found in Africa. It was first described to European audiences by German zoologist Hinrich Lichtenstein in 1812. Active mainly during the day, the impala may be gregarious or territorial depending upon the climate and geography. The impala is known for two characteristic leaps that constitute an anti-predator strategy.

Impala is an elegant and magnificent species of antelope. The animal has slender body with the identifying "M"-like marking on the rear. This medium-sized antelope possesses thin, pointed horns with tips, lying far apart from each other. Males of this species are identified by the characteristic "S"-like horns. The elegant limbs of these animals have scent glands behind the ankles. The overall coloration of their fur is red-brown with paler sides. In addition, they have black and white colored areas on their body. Thus, the tail, belly, chin, lips, inside ears as well as the lines above the eyes are colored with white. Meanwhile, black bands cover their thighs, tail, forehead and ear tips.

Impalas are distributed throughout the northeastern part of South Africa, Angola, southern Rwanda, Uganda, and Kenya. Close proximity to a water source is an important life condition for these animals. Generally, they prefer woodland with little undergrowth as well as low to medium-height grassland.

Impalas have polygynous mating system, where each male mates with a number of females. The period of peak breeding activity is March-May. During this period, pregnant females live in isolation to give birth. The gestation period lasts from 194 to 200 days, yielding a single calf, which weighs about 5kgs (11 lbs). After a few days, the calf and the female rejoin the herd. Then, after a while, the calf joins a crèche of other young impalas. They are weaned at 4-5 months old. Male impalas reach reproductive maturity at 1 year of age, while females are ready to breed when they are between 1 and 2 years old. Becoming reproductively mature, they, however, do not rush to establish territories. They typically start mating only at 4 years old.

These antelopes are both diurnal and nocturnal. They are most active just after sunrise and before sunset, socializing and moving with their herd, whereas, during the nighttime hours, impalas usually lie down and ruminate. Female impalas and their offspring gather into herds, containing from 15 to 100 individuals. The home range of each herd covers a territory, varying from 80 to 180 hectares. During the wet season, females become highly territorial, defending home ranges of their herds. On the other hand, young males form bachelor, non-territorial herds of up to 30 individuals. During the dry season, male and female herds can often be seen mixed together. Home ranges of mature breeding males vary from season to season. Thus, during the breeding season, they usually have smaller home ranges, which they fiercely defend. Males use a wide variety of methods to defend their home range, including fighting, tail-raising, chasing, roaring, erect posture as well as forehead marking and forehead rubbing.

The animals presently suffer from the fragmentation of their range due to the development of human settlements. In addition, roads such as the Serengeti Highway in Tanzania have an extremely negative effect, making it difficult for scattered migrating populations to move between parks, where the antelopes feed, mate and give birth. In addition, populations in South Africa are exposed to hunting for their meat by local people.

2-6-2019 LINYANTI CAMP, BOTSWANA - CHACMA BABOON (Papio ursinus)

2-6-2019 LINYANTI CAMP, BOTSWANA - SOUTHERN CORDONBLEU (MALE) (Uraeginthus angolensis)

https://www.inaturalist.org/taxa/14026-Uraeginthus-angolensis

2-6-2019 LINYANTI CAMP, BOTSWANA - GOLDEN TAILED WOODPECKER (Campethera abingoni)

The golden-tailed woodpecker (Campethera abingoni) is a species of bird in the family Picidae. Its specific name commemorates the 5th Earl of Abingdon. It belongs to a species complex that includes the Knysna woodpecker to the south of its range, and the mostly allopatric Mombasa woodpecker to the northeast, with which it perhaps hybridizes.

It is present in coastal forest, miombo, mopane and acacia woodlands. It shows a preference for riparian woodland, particularly in the dryer parts of southern Africa. It may intensively forage small areas in the lower to middle strata of trees. It establishes fairly large territories of 10 to 15 ha, and can cover some distance between foraging sites.

Very widespread in woodlands or forest south of the equator, and very localized north of it. It is found in Angola, Benin, Botswana, Cameroon, Central African Republic, Chad, Republic of the Congo, Democratic Republic of the Congo, Eswatini, Ivory Coast, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Malawi, Mali, Mauritania, Mozambique, Namibia, Rwanda, Senegal, South Africa, South Sudan, Tanzania, Uganda, Zambia, and Zimbabwe.

It obtains most food by probing and gleaning, but also hammers dead or infected wood rather more frequently than other Campethera species. It feeds mostly on arboreal ants and termites, but also takes millipedes, wood-boring larvae and leaf-feeding moth larvae. It occurs alongside the Cardinal woodpecker which to some extent exploits thinner branches.

They nest during early summer. Both sexes excavate the nest, usually on the underside of a branch in the lower to middle level of a tree. Two to three glossy white eggs are laid, and the parents take turns to incubate them. The male incubates at night. The incubation period is about 13 days, and the chicks are fed regurgitated food by both parents. Chicks leave the nest after 22 to 25 days. Their nests are parasitized by various species of honeyguide.