Wednesday 19 May 2021

Reptiles and Amphibians in the eMalangeni Peat Swamp Forest

Here are a few of the reptiles and amphibians that one could encounter in the eMalangeni Peat swamp forest. I will be adding to this list as from time to time when I have taken identified more species as well as when I take or acquire more photos.

The flap-necked chameleon, Chamaeleo dilepis 
known as unwabu in Zulu is a lizard belonging to the family Chamaeleonidae which apart from being found in the eMalangeni Peat Swamp Forest has a very wide distribution, occurring throughout much of sub-Saharan Africa from as far north as Ethiopia and Somalia to a western extreme of Cameroon, and as far south as northern and eastern South Africa. It inhabits coastal forest, moist or dry savannah, woodland and bushy grasslands, and may also venture into rural and suburban areas.

Unwabu the flap-necked chameleon, Chamaeleo dilepis in the eMalangeni Peat swamp forest at Kosi Bay

Unwabu the flap-necked chameleon, Chamaeleo dilepis in the eMalangeni Peat swamp forest at Kosi Bay

Chamaeleo dilepis is a large green chameleon a pale stripe on the lower flanks reaching a total length of 35 cm that is difficult to not recognize. 
The Flap-Necked Chameleon feeds on Insects, particularly grasshoppers and beetles, in return they are commonly preyed on by snakes such as the Boomslang (Dispholidus typus) and the Southern Twig Snake (Thelotornis capensis).
It is easy to tell the males from the females in the Flap-Neck Chameleon, the males having a broadness at the base of their tails and also a spur growing out from the back of each hind foot.
Unwabu reproduces by means of 10-40 eggs that are laid in a hole dug into the soil that take 10–12 months to hatch. 

Nile Crocodile, Crocodylus niloticus 
which grows to a length of 16 meters, and a weight of up to 500 kilograms, is the largest reptile to be encountered in the emalangeni Peat Swamp Forest where it is to be found on the shores of lake aManzimnyama as well as in the aManzimnyama river and its side streams that flow through  and drain the forest into the Lake.

The Nile Crocodile Crocodylus niloticus which is known locally in the Zulu language as Ingwenya

Nile Crocodile Crocodylus niloticus

The Nile Crocodile Crocodylus niloticus which is known locally in the Zulu language as Ingwenya is widely distributed throughout sub-Saharan Africa, occurring mostly in the central, eastern, and southern regions of the continent, and lives in different types of aquatic environments such as lakes, rivers, swamps, and marshlands.

Greater Leaf-folding Frog, Afrixalus fornasinii
belonging  to the frog family Hyperoliidae are relatively large, conspicuous frogs which are easily distinguished from the sympatric dwarf Afrixalus species, both morphologically and by its loud, distinctive call.

Greater Leaf-folding Frog, Afrixalus fornasinii belonging  to the frog family Hyperoliidae

Greater Leaf-folding Frog, Afrixalus fornasinii belonging  to the frog family Hyperoliidae in the eMalangeni peat swamp forest Kosi Bay.

The Greater Leaf-folding Frog which occurs in the eMalangeni Peat Swamp Forest has a wide distribution that extends from the coast of southern Somalia southward through East Africa to Malawi, Mozambique and eastern Zimbabwe into South Africa where it occurs along the coast of KwaZulu-Natal as far south as Port Edward. 
 fornasinii is locally abundant, it also occurs in a number of coastal and lowland reserves such as those at Mkuze, False Bay, St Lucia and Mtunzini. 
this frog gets its name because of its habit of  longitudinally folding leaves up to 1 m above the water into which between 30 and 80 white eggs are deposited in which take about five days to hatch when they fall into the water. The tadpoles that are carnivorous appear to specialize on mosquito larvae they metamorphose about three months later hatching.
During the breeding season, Afrixalus fornasinii inhabits more-or-less stagnant water bodies containing large stands of saw grass Afrixalus Afrixalus and bulrushes Typha Afrixalus. 
In winter they have been found sheltering in the leaf axils of arum lilies, Zantedeschia aethiopica  and Strelitzia nicholai, often a considerable distance from their breeding sites.

Southern Tree Agamas, commonly known as Blue-headed lizards, Acanthocercus atricollis
The Blue-headed lizards apart from being found in the eMalangeni Peat Swamp Forest has a very large range in Africa being found in the following countries, Eritrea, Somalia, Ethiopia, Sudan, South Sudan, Uganda, D.R.C., Kenya, Tanzania, Zambia, Malawi, Mozambique, Zimbabwe, Angola, Botswana, Namibia, Swaziland and South Africa.

this magnificent lizard is called the black-necked agama (Acanthocercus atricollis) when its most striking feature is the bright blue head of the male

This magnificent lizard is called the black-necked agama (Acanthocercus atricollis) when its most striking feature is the bright blue head of the male

When breeding, the males are colourful and their vividly blue heads are most striking. Non-breeding males and females are considerably less conspicuous although their more understated scaly markings still render them handsome reptiles.
Blue-headed lizards that are ambush foragers are active during the day when they catch and eat mostly insects, particularly ants, as well as beetles and grasshoppers, at night they sleep in tree hollows or under loose bark. Agamas are unusual in that Most lizards do not eat ants because they are too acidic. 

Eastern Hinged Back Tortoise, Kinixys zombensis, ufudu, Glattrand-Gelenkschildkröte
I was most amazed to find this tortoise pictured below wandering around feeding in the eMalangeni forest, I had never thought of tortoises as being forest dwellers.

Eastern Hinged Back Tortoise, Kinixys zombensis

Eastern Hinged Back Tortoise, Kinixys zombensis

Hinged Back Tortoises are famous and unique due to the ability to close the back part of the shell over their hind limbs, likely as protection from big cats and other powerful predators. Most species are considered at least threatened and several are very endangered. They are a significant food source in most of their range, some people using trained dogs to locate them. There is also pressure from over-collection for the pet trade and habitat loss.

They do not hibernate, but possibly aestivate or just rest in hot, dry weather.
The head and limbs are generally typical of a tortoise- elephant-like limbs with slightly flattened fore-limbs- but are longer and more slender. The limbs and shell shape give them a distinctive 'walking downhill' look. No visible toes, but five toenails on each limb. The tail has a nail-like claw on the tip. The limb coloration is usually fairly solid, ranging from tan to nearly black.

Eastern Hinged Back Tortoise, Kinixys zombensis, ufudu, Glattrand-Gelenkschildkröte

Eastern Hinged Back Tortoise, Kinixys zombensis

Eastern Hinged Back Tortoise is an omnivore, with a very varied diet consisting mainly of vegetables, twigs, roots, leaves, fruits, earthworms, snails, tadpoles and other small invertebrates.

The African striped skink (Trachylepis striata), commonly called the striped skink, is a species of lizard in the skink family (Scincidae).

The African striped skink (Trachylepis striata), commonly called the striped skink, is a species of lizard in the skink family (Scincidae).

The Gaboon Adder Bitis gabonica

The Gaboon Adder Bitis gabonica

This post is not complete I will continue in the morning

 

Monday 10 May 2021

Methuselah's beard lichen Ursnea longissima in the eMalangeni peat swamp forest

Methuselah's beard lichen, Usnea longissima,  a well know medicinal plant  is a lichen in the family Parmeliaceae grows epiphytically on trunks and branches of trees in the eMalangeni forest.

Usnea longissima is a  pale grayish-green fruticose lichen that grows like leafless  tassels which anchored themselves on bark or twigs.

Like other lichens Usnea longissima is a symbiosis of a fungus and an alga. In the genus Usnea, the fungus belongs to the division Ascomycota, while the alga is a member of the division Chlorophyta. The branches of Usnea have an inner central cord which is elastic when wet.

Methuselah's beard lichen Ursnea longissima in the eMalangeni peat swamp forest

Methuselah's beard lichen Ursnea longissima in the eMalangeni peat swamp forest

Usnea lichens have a history of use that spans centuries and countries from ancient Greece and China to modern Turkey, from rural dwellers in South Africa to modern-day naturopathic physicians and herbalists in the United States.
Usnea lichens are rich in usnic acid, which has demonstrated in vitro antimicrobial activity against bacteria, viruses, and protozoa. Additionally, it exhibits anti-inflammatory and analgesic activity. 

Usnea longissima reproduces via vegetative means through fragmentation, asexual means through soredia, or sexual means through ascogonium and spermatogonium. The growth rate of Usnea longissima in nature is slow. An aid in identifying the genus Usnea is the elastic chord or axis running through the middle of the thallus that can be revealed by gently pulling a filament apart from either end.

Methuselah's beard lichen Ursnea longissima in the eMalangeni peat swamp forest

Methuselah's beard lichen, Usnea longissima

Usnea longissima is very sensitive to air pollution, especially sulfur dioxide, it can therefore be used as a bioindicator, because it tends to only grow in those regions where the air is clean and of high quality. Where the air is totally unpolluted, they can grow to 10–20 cm long.
Usnea longissima where it occurs is often used as nest insulation material by birds such as the cape white eye.

When dry Usnea longissima is extremely flammable which makes it ideal to be used as a fire starter.

Thursday 6 May 2021

The Gaboon Adder Bitis gabonica in the eMalangeni Forest

The Gaboon Adder Bitis gabonica is a large, colourful and highly venomous snake that with a measure of good luck can be seen in the eMalangeni Peat Swamp Forest in the southern portion of the Kosi Bay System.

The Gaboon Adder Bitis gabonica

Although the Gaboon Adder has a wide distribution throughout the tropical rainforests of Africa, in South Africa they are confined to the hot and humid coastal forests that stretch south from the Mozambique border to the Mapelane Nature Reserve which is the southern most reserve within the iSimangaliso Wetland Park just South of lake St. Lucia then further south to Mtunzini being their southern limit.

The Gaboon adder is the largest of the adders in Africa, weighing up to 20 kilograms and reaching lengths of up to 1.8 meters, with a head up to 15 cm across at the widest point. In South Africa they are a little smaller averaging from .90 to 1.20 meters in length. The fangs which are the longest of any venomous snake may reach a length of 55 mm. Unlike most snakes the Gaboon Adder gives birth in late summer to up to 60 live young.

The colouration is a striking combination of light and dark brown, pink and purple arranged in diamonds and stripes along its back.  Light and dark lines radiate from around its small eyes. The  broad head mimics a fallen leaf, right down to the central vein, this striking pattern is excellent camouflage in the snake's native habitat, helping it blend into the leaf litter on the forest floor.

Gaboon Adders with are primarily nocturnal have a reputation for being slow-moving and placid, locomotion is mostly rectilinear, in a sluggish walking motion of the ventral scales.
Gaboon Adders are passive ambush hunters, waiting often for considerable periods of time, often in puddles of water, concealed to strike at whatever variety of birds, mammals, and amphibians such as doves, guineafowl, francolins, many different species of rodents, including field mice and rats, as well as hares, rabbits, frogs and toads, even prey items, such as monkeys, that pass within range.  It has been reported that the occasional kid goat belonging to local farmers has been caught and eaten by the Gaboon adder at eMalangeni. Unlike most venomous snakes that strike and release the Gaboon adder holds onto its prey until its dies.

Gaboon adders have a placid nature and very rarely bite humans, most bites that do occur happen when the snake is stepped on before it has an opportunity to get away. If harassed, it will raise the upper part of its body and they may hiss loudly as a warning, doing so in a deep and steady rhythm, slightly flattening the head at the expiration of each breath. Despite this, they are unlikely to strike unless severely provoked, however, they are one of the fastest-striking snakes in the world, so care should be taken in regards to provoking them.

A bite from a Gaboon adder is extremely rare, due to their unaggressive nature, their sluggishness and unwillingness to move even when approached. Bites most often occur due to persons accidentally stepping on a Gaboon adder, but even then in some cases this does not guarantee a bite. When a bite does occur, though, it should always be considered a serious medical emergency. Polyvalent anti venom is effective in the treatment of a bite from the Gaboon adder.

Please pay a visit to the African Snake Bite Institute for more information and lots more photos


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