Previous topic | First unread post | Next topic
Page 1 of 8 [ 113 posts ]
Go to page 1, 2, 3, 4, 5 ... 8  Next
Post new topic Post a reply
Print view

Crocodile: Nile

Senior Virtual Ranger
Joined: Sat Jan 29, 2005 12:52 pm
Posts: 1738
Location: My business...
Profile  WWW 
Fri Jan 21, 2005 4:02 pm Unread post
I saw a very interesting documentary on TV this morning, didn't catch the name unfortunately, but it was a National Geographic Documentary about Super Croc, a dinosaur that lived, well, whenever. They found the bones in Niger in the desert and wanted to rebuild the animal. So they visited countries all over the world to take measurements of live crocs to figure out how big it would have been approximately. To make a long story short measurements indicated that it must have been 8 times the length of its head - 40ft! :shock:
Now the bit that got me onto it again. They showed how crocs fight - something horrible to witness! They literally tear the limbs off each other. They started doing research on why crocs don't die, because a croc bite causes severe infection and death if not treated. Two kinds of crocs in different parts of the world were caught and blood samples drawn from them. When tested this showed that their blood contained a natural anti-biotic which prevents infection setting in the wounds. 8)
Last post

Legendary Virtual Ranger
Joined: Thu Dec 02, 2004 10:27 am
Posts: 5353
Location: Chasing down the rarities
Profile  WWW 
Mon Jan 24, 2005 7:32 am Unread post
I have heard of a massive croc in the Crocodile river which gave some trouble and was killed. Inseide they found some human remains: arm bangles and a watch. The croc was huge.
After loading it onto a bakkie it hanged off from the back.

The ranger that shot it couldn't get to the sides of it's body with outstretched arms.

A very bad inceident took place near Skukuza where some Park staff and friends were chilling out on the bank of the Sabie river. This was quite a time ago.

One guy (Surname was Ysel, I think) got attacked by a croc and was dragged to deeper water to be drowned, and torn apart via the deathroll as crocs do. He managed to hang onto some roots next to the bank and a friend of his was fortunately reacting to the attack and manged to stab the croc in the eye with a knife.

The croc let go and swan away. If I remember correctly the victim had to hold in his intestines with his hands and was in hospital for about 6-8 months.

I think the crocs in the Limpopo are definitely tasting some human flesh.

Senior Virtual Ranger
Joined: Wed Jan 12, 2005 12:55 pm
Posts: 403
Location: Neither here nor there.
Fri Mar 25, 2005 4:52 pm Unread post
When we saw our croc with warthog at Sunset Dam in October last year he was originally in the dam and then decided to cross the road. He lay just of the road but was clearly heading of to the river. We didn't stay to see where he went but he obviously had the river in mind. I'm wondering whether the dam being a somewhat closed group of crocs offers a higher density of competition for the food and by going to the river allows the croc to feed less hindered?

Here is the pic of him crossing the road:




Nile crocodile

Honorary Virtual Ranger
Joined: Fri Jan 14, 2005 5:42 pm
Posts: 17943
Location: Red sand, why do I keep thinking of red sand?
Profile  WWW 
Tue Aug 23, 2005 2:15 pm Unread post
Common names
Nile crocodile, Mamba, Garwe, Ngwenya

Name etymology
> Crocodylus is derived from the Greek krokodeilos which means literally "pebble worm" (kroko = pebble; deilos = worm, or man) referring to the appearance of a crocodile.
> niloticus means "of the Nile" (Nile River, Africa)

Subspecies (Proposed)
Given the wide distribution range, a number of population differences have been observed, and several subspecies proposed.
These are rarely differentiated in the literature, however, and they are not officially recognised.
Suggested subspecies: C. n. africanus (East African Nile crocodile), C. n. chamses (West African Nile crocodile), C. n. corviei (South African Nile crocodile), C. n. madagascariensis (Malagasy Nile crocodile, Malagasy alligator, Croco Mada), C. n. niloticus (Ethiopian Nile crocodile), C. n. pauciscutatus (Kenyan Nile crocodile, Kenya alligator, Kenya caiman), C. n. suchus (Central African Nile crocodile)

The Nile crocodile is a member of the reptile class and is a survivor of the Archosaria, a group that included dinosaurs.
They have not changed much over millions of years.
They are more advanced than other modern day reptiles in that they have a four-chambered heart like mammals and can adapt their behavior to survive.
They have a lifespan of 70 to 100 years.

Wide habitat preferences, reflecting their success and distribution- e.g. lakes, rivers, freshwater swamps, brackish water.
Sub-adults disperse into different habitats, away from breeding areas, when they reach a length of approximately 1.2 m.
Nile crocodiles modify their habitat by digging dens (usually with their snouts and feet) into which they retreat from adverse conditions such as temperature extremes.

Considerable variation exists throughout the range of the Nile crocodile.
Generally, it is a large crocodilian, averaging 5 m in length but reportedly reaching 6 m in rare instances. There are dubious reports of 7 m animals having existed, but these are hard to verify.
There is some evidence that Nile crocodiles in cooler countries (eg. South Africa) reach slightly smaller adult sizes (4 m).
There are two known population of dwarf Nile crocodiles living on the extreme limits of the species' range, in Mali and even the Sahara Desert!
Due to suboptimal conditions, adults average between 2 and 3 metres.
Juveniles are dark olive brown with black cross-banding on the tail and body.
This banding becomes fainter in adults.
The snout is long and broad and ends in nostrils which can close underwater.
The eyes have a third eyelid which protect them while underwater.
The eyes, ears, and nostrils are found on the same plane on the top of the head, allowing the crocodile to be completely submerged underwater while still being able to see, smell, and hear.
The teeth are long and conical.
The teeth on the top jaw are in line with the bottom jaw, a feature which distinguishes all crocodiles from alligators.
The fourth lower tooth is larger than the others and can be seen when the mouth is closed.
Nile crocodiles have 66 teeth.

Although the juveniles are generally restricted to eating small aquatic invertebrates and insects, they soon move onto larger vertebrates (fish, amphibians and reptiles).
Adults, however, can potentially take a wide range of large vertebrates, including antelope, buffalo, young hippos, and large cats.
Fish and smaller vertebrates often form the greatest part of their diet, however.
As with C. porosus, they have a reputation as being man-eaters, although probably kill more people than all other crocodilian species combined.
Along with hippos and lions, crocodiles account for perhaps a few hundred deaths and disappearances each year, although exact figures are very hard to verify.
Nile crocodiles will also often scavenge from carcasses, together with a number of other animals, all of which seem to tolerate each others' presence.
They have a rather well-known relationship with several species of birds (e.g. spur-wing plover, called "trochilus" by Herodotus) which are reputed to pick pieces of meat from between the teeth of the crocodiles as they gape - the birds gain a meal, the crocodiles have their teeth cleaned of scraps they could not eat themselves.
Whether such a mutual relationship actually exists is hard to determine from the literature and anecdotal reports, but seems more likely to be opportunistic rather than symbiotic.

Several prey animals have been found wedged under submerged branches and stones, leading to reports that the crocodiles store unwanted prey here until a later date.
Some claim that it is necessary for the prey to decompose before the crocodiles are able to tear portions of flesh off, but this is unlikely to be true.
The flesh may become softer if the prey remains in water after death, but crocodiles will certainly avoid rotting meat.
When feeding, a number of individuals will hold onto a carcass with their powerful jaws whilst twisting their bodies.
The anchorage provided by the other individuals allows large chunks to be torn off for easier swallowing.
A few lone individuals have been reported to wedge prey between branches in order to provide the anchorage necessary for such actions to be effective, which could even be claimed to be a form of primitive tool use.
Other cooperative feeding behaviour has been reported, such as the action of many animals to cordon off an area of water to concentrate fish within.
A hierarchy of feeding order is often observed in such situations, with more dominant animals feeding first. Groups of crocodiles will often move onto land to scavenge from kills made up to several hundred metres from the water.
Adults have also been observed fishing using their bodies and tails to corral the fish towards the bank where they are concentrated and picked up with a sideways snatch of the jaws.
Social behaviour in Nile crocodiles is often underestimated, although there are many aspects still poorly understood.

It has been observed that social status may influence an individual's feeding success, with less dominant animals tending to eat less in situations where they come into frequent social contact with other, more dominant individuals.

Males become sexually mature at 10 ft (3 m - 10 years of age) and females at 6.5 ft (2 m - 10 years of age).
The breeding season is July, where they mate in shallow water.
The female lays 30-80 eggs in a nest of rotting vegetation near the water's edge.
The eggs hatch after an incubation of 2-3 months.
If the nest was below 85° F during this period, then all the hatchlings are female.
Above 95° F - male.
Between 85° F and 95° F - both male and female.
When it is time to hatch, either parent helps to open the eggs by cracking them in its mouth.
They are then carried to the water.
They remain in the water for several weeks.
Hatchlings are 12 in (30 cm) long and are dark olive green with darker cross bandings on the body and tail.
This species digs hole nests up to 50 cm deep in sandy banks, several metres from the water.
These may be in close proximity to other nests.
Timing of nesting behaviour varies with geographic location - it takes place during the dry season in the north, but at the start of the rainy season further south, usually from November through to the end of December.
Females reach sexual maturity around 2.6 m, males at around 3.1 m.
Females lay around 40 to 60 eggs in the nest, although this number is quite variable between different populations.
Females remain near the nest at all times.
Incubation time averages 80 to 90 days (ranges from 70 to 100 days), after which females open the nest and carry the juveniles to the water.
Both males and females have been reported to assist hatching by gently cracking open eggs between their tongue and upper palate.
Hatchlings remain close to the juveniles for up to two years after hatching, often forming a creche with other females.
As with many crocodilians, older juveniles tend to stay away from older, more territorial animals.

Despite the vigilance of the female during the incubation period, a high percentage of nests are raided by a variety of animals, from hyenas and monitor lizards to humans.
This predation usually occurs when the female is forced to leave the nest temporarily in order to thermoregulate by cooling off in the water.

Crocodiles are not solitary predators as often imagined, but social creatures.
Cows of some species protect not only their hatchling young but offspring from the previous year.
Nile Crocodile bulls also respond to distress calls of their young., crocodiles convey social messages with motions, odors, postures, by touch and with sounds.
Nile Crocodiles produce at least six different vocal signals.
Both cow and bull Nile Crocodiles maintain territories, especially during breeding season.


Few animals are willing to prey on the Nile crocodile except for other Nile crocodiles and humans.
They have been over hunted by humans for their skin, which is good for tanning, and their meat.
Habitat destruction also dwindles their numbers.
The young are preyed upon by Nile monitor lizards, marabou storks, herons, ibises, turtles, and catfish.
Nile crocodiles are not endangered.

The trade of the Nile crocodile has become an environmental concern especially in the Republic of Tanzania. Crocodile skins are being exported from Tanzania in large quantities due to the high demand for leather goods.
The Nile crocodile skins are being exported for the luxury leather goods market including shoes, handbags and belts, especially to Japan, Italy and France.
However, this trade has caused the Nile crocodile to be classified as an endangered species.
As a result, the United States along with 120 other countries throughout the world have joined in signing the Convention on International Trade and Endangered Species of World Fauna and Flora (CITES) treaty in 1973 to ban skins from endangered or potentially endangered species, such as the Nile crocodile, from being traded.
In April 1994, the classification of the Nile crocodile was changed from endangered to threatened as a result of various acts and treaties protecting this species.

Legendary Virtual Ranger
Joined: Thu Dec 02, 2004 10:27 am
Posts: 5353
Location: Chasing down the rarities
Profile  WWW 
Mon Jan 16, 2006 8:01 am Unread post
These reptiles are one of the most cunning and dangerous ones you can happen to sign a contract with. It is said that they can reach lengths of up to 23 feet, which sounds pretty much like the proteas winning the next world cup, very suspect.

A croc of 15feet is a monster and weighs close to a ton. It stands waist high neext to a grown man. A 18 footer is unbelieveable. Probably one of the most well-known man-eaters.

They are extremely tenacious and tough. The little interest a croc shows in turning his toes up was well illustrated by a well-known big game hunter when a client of his shot one thru the brain. The PH went in to retireve the croc. as he grabbed it by the tail to pull it to shore the croc lashed up knocking him down twice. He fired two more rounds into what was left of the croc's head after the initial shot. After he waited for the pieces torain down he once again pulled the croc to shore.

Whilst taking pics of it it lashed around once more and gave the distinct croc roar. the client this time nailed it twice again.

After the belly hide was cut from it, they left and retuned 2 hours later to find a dead vulture in the jaws of the croc.

Tough buggers.

Like it is said: Never trust a croc to be dead untill the hide was salted in. And even then think twice about it being dead.

Distinguished Virtual Ranger
Joined: Thu Jan 13, 2005 9:02 pm
Posts: 17128
Location: mind in SA, body in The Netherlands
Profile  WWW 
Tue Jun 20, 2006 1:22 pm Unread post
I believe this is the resident croc at Sunset Dam
Usually lies on the leftside from the carpark.
Not a small one imo

Joined: Fri Apr 14, 2006 11:06 am
Posts: 3
Wed Jun 21, 2006 7:37 pm Unread post
Anywone remember seeing the footage of a crocodile attacking an antelope and then a hippo chased off the croc and tried to save the antelope (by what looked like mouth to mouth resuss) and stayed watch over it for about a day after it had died - one of the most surreal wildlife experiences I had seen (unfortunately it was only on tele but it was still awesome(

Crocodile Kill at Lake Panic

Joined: Mon May 29, 2006 8:27 pm
Posts: 14
Location: Bedfordview, Johannesburg
Profile  WWW 
Wed Jul 05, 2006 10:09 pm Unread post
Late afternoon on Sunday June 26th we took a drive to Lake Panic bird hide close to Skukuza.
Just before the turn off to the car park there is the Mafunyana Creek which leads into Lake Panic.
We saw a female Bushbuck about 50 metres from the road foraging in the dry stream bed.
Lake Panic was superb as always.
However since it was late afternoon we didn't manage to spend much time at the hide so decided to come back the next day.
We'd been in the hide for about an hour when somebody saw a large crocodile enter the water on the far bank with an animal in its mouth.
My son saw, with the aid of binoculars, that the animal was a female Bushbuck.
Immediately we remembered the Bushbuck of the previous afternoon and were pretty sure this would have been the animal killed by the crocodile.
It was not possible to get a close view of the croc but about an hour later I saw what I thought was the tail of a large catfish sticking out of the mouth of a very big croc on the southern bank of the dam across from the bird hide (about 80 to 100 metres).
As the crocodile moved it was then possible to see that the "tail" was actually the ear of the Bushbuck and its face could also be seen.
I managed to get a few shots of the croc with the Bushbuck in its mouth and have posted them on my site. I've also taken an image from Google Earth to provide a good aerial shot of the location relative to the bird hide.

Virtual Ranger
Joined: Wed Feb 15, 2006 6:46 pm
Posts: 175
Location: In the studio for now
Profile  WWW 
Tue Aug 29, 2006 3:04 pm Unread post
What an awesome sighting!!! I guess if the animals won't come to the water the crocs will just go to them. They'll be wandering around the camps soon :)

Seeing as though this is a crocodile thread, I thought I'd like to post my favourite pic from the last outing - can't help it, I'm addicted!
This was taken from the Crocodile river bridge at Malelane gate. Usually they just sit around doing as little as possible, but this one decided to try and chase the other one away.


Crocodile at Biyamiti Weir

Joined: Wed Aug 24, 2005 1:34 pm
Posts: 279
Location: Witrivier
Wed Sep 13, 2006 11:43 am Unread post
Hi guys and girls.

I saw :shock: this huge crocodile bathing in the sun at the Biyamiti Weir.(10 September 2006)
He is about 3 - 4 metres in lenght. Be aware not to swim in that pond if you planned on doing that maybe. :D

I couldn't beleive that this monster can live there and survive.
Do anybody else know about this guys at the weir??


Junior Virtual Ranger
Joined: Wed Aug 24, 2005 9:57 am
Posts: 2592
Location: South Africa, Mpumalanga, Middelburg....289km from KNP!!!
Wed Sep 13, 2006 12:21 pm Unread post
WOW :shock:
thats a real monster...looks like 1 of those super Crocs from the Famous Mara river :twisted:

I wonder if there's a census for the Largest Croc ever sighted In KNP?

Legendary Virtual Ranger
Joined: Thu Dec 02, 2004 10:27 am
Posts: 5353
Location: Chasing down the rarities
Profile  WWW 
Wed Sep 13, 2006 2:15 pm Unread post
It was said that the largest ever was one of 4.8 meters. I will try and find the text.

Joined: Sat Aug 19, 2006 12:09 pm
Posts: 42
Location: PRETORIA
Wed Sep 13, 2006 3:08 pm Unread post
Saw 2 juvenile crocs literally knocking fish out of the shallows with their tails ( malelane gate bridge ). They worked as a team with the one snapping up the fish after the other had knocked them sky high!

Joined: Tue Mar 22, 2005 6:31 pm
Posts: 10855
Location: Ballito, KZN North Coast, South Africa
Thu Sep 14, 2006 9:18 am Unread post
There are some pretty impressive crocs at Sunset Dam and also on the islands in the river seen from Lower Sabie camp and restuarant. :D

Virtual Ranger
Joined: Fri May 12, 2006 4:10 pm
Posts: 2416
Location: SA
Sun Nov 19, 2006 1:42 pm Unread post

This lil guy was at Lower Sabie bridge

Post new topic  Post a reply
Go to page 1, 2, 3, 4, 5 ... 8  Next
Page 1 of 8 [ 113 posts ]
Previous topic | First unread post | Next topic

Users browsing this forum: No registered users and 1 guest

Search for
Jump to