Nile Crocodile

[dinosauria101]

A good deal of Niles average 527 kg in Limpopo
(this may be the source but I am unsure)
pdfs.semanticscholar.org/1b15/160aeffe39807fd8121ffef83188b2dce3b5.pdf

[Infinity Blade]

This seems to corroborate something that Ceratodromeus posted earlier in this thread.

The Nile crocodile can also singly threaten the lion, depending on the size ratio of the crocodile and lion. Lions have been known to kill crocodiles venturing onto land, while the reverse is true for lions entering waterways containing crocodiles. Lion claws have on occasion been found in crocodile stomachs as evidence.

Sithole (2018)

The two Shaws male lions dominated the alluring, lush grasslands of Londolozi. As is typical with male lions, they ambled along patrolling their territory with seemingly no care in the world. On the morning in question, their morning patrol took them past Mvubu dam, which is relatively close to camp. Both males had built up a thirst and needed to satisfy it. As nonchalant as only a lion can appear, they approached the dam without a care in the world. What they did not realise was that lurking in the murky waterhole was a predator that was about to change the history of Londolozi. One of the Shaws males approached the waterhole and stooped down, sipping water quite leisurely. Suddenly the placid surface of the water exploded as a torpedo-shaped crocodile erupted from under the lion’s nose, clamping down on his muzzle. Trackers visiting the scene later to work out what had happened saw two deep gouges scarred into the earth from the lions paws as he struggled to prevent himself being dragged to a watery grave.
Crocodiles drag their prey underwater to drown them. Once the prey is dead, the crocodile may then feed at its leisure, often waiting a couple of days for the meat to begin decomposing, making it easier to rip chunks of.
In the incident in question, the second Shaws male was found that afternoon, still near the waterhole, calling forlornly for his brother.

By killing this lion, the subaqueous crocodile changed the entire dynamic of lions at Londolozi. The surviving Shaw’s male was unable to protect the territory and left a void for what has now become the most infamous coalition of male lions probably in the world, the Mapogo.

blog.londolozi.com/2016/07/23/londolozis-real-apex-predator/

[Infinity Blade]

This is what a poster on a Discord server I'm on shared. Nile crocodiles will sometimes gang up on and kill adult hippos that were weakened by injury (seemingly from mating disputes).


Reference

EDIT: Here's a continuation of that last sentence, confirming that these hippos are usually injured in territorial conflicts.



Source: Guggisberg (1972). Crocodiles: Their Natural History, Folklore and Conservation

And I just had to get this photo in here. It's so metal. Believe it or not, the photographer was actually trying to take a photo of a kingfisher at first, before the croc and hippo burst out of the water fighting. The bird gave zero f*cks and stayed where it was (link).

Image source

[Supercommunist]

I remember there being an article where a huge mob of crocodiles killed a hippo. The photos were kind of bad and didn't show much actiob but I remember their being a photo of them eating the hippo. Can't find it anymore though.

[Infinity Blade]

Well, I suppose that's not far out there at all. Even more so, of course, if the hippo was injured beforehand.

The first excerpt says that these adult hippos are usually weakened by injury. I can't help but feel like that implies that, on occasion, they can also successfully mob and kill adult hippos that are in good condition. If so, that'd be a battle I'd love to see for myself (then again, I'd love to see any attempt at predation on a fully grown hippo by a crocodile gang, whether it's "fair" or not).

[Infinity Blade]

Appendicular Muscle Physiology and Biomechanics in Crocodylus niloticus

Archosaurian reptiles (including living crocodiles and birds) had an explosive diversification of locomotor form and function since the Triassic approximately 250 million years ago. Their limb muscle physiology and biomechanics are pivotal to our understanding of how their diversity and evolution relate to locomotor function. Muscle contraction velocity, force, and power in extinct archosaurs such as early crocodiles, pterosaurs, or non-avian dinosaurs are not available from fossil material, but are needed for biomechanical modeling and simulation. However, an approximation or range of potential parameter values can be obtained by studying extant representatives of the archosaur lineage. Here, we study the physiological performance of three appendicular muscles in Nile crocodiles (Crocodylus niloticus). Nile crocodile musculature showed high power and velocity values—the flexor tibialis internus 4 muscle, a small “hamstring” hip extensor, and knee flexor actively used for terrestrial locomotion, performed particularly well. Our findings demonstrate some physiological differences between muscles, potentially relating to differences in locomotor function, and muscle fiber type composition. By considering these new data from a previously unstudied archosaurian species in light of existing data (e.g., from birds), we can now better bracket estimates of muscle parameters for extinct species and related extant species. Nonetheless, it will be important to consider the potential specialization and physiological variation among muscles, because some archosaurian muscles (such as those with terrestrial locomotor function) may well have close to double the muscle power and contraction velocity capacities of others.

academic.oup.com/iob/article/2/1/obaa038/5956721?login=false

[Infinity Blade]

An account of a 14 foot Nile crocodile preying on a 4,000 lb female black rhinoceros in the late 1950s in Tanzania.


I was also able to track down the original source (link->).