These animal babies may look cute, but if you take a closer look, they're dead on the inside. These killer baby animals have the ferociousness to kill their brothers and sisters in order to survive. Scientists may want to call this "instinct," but it's clear the devil is at play here. Fratricide is common within the animal kingdom and all the species on this list are prime examples of just how savage animals - especially young cubs, chicks, and insects - can truly be. From death by impact, stabbing, eating, stinging, and fighting, these killer baby animals are able to do what humans could never imagine: eat their brothers, sisters, and cousins if they're still hungry.
The Golden Eagle creates huge nests that average 5-6 feet wide and 2 feet high. The fight for survival starts right away for baby eaglets. Since eggs are laid a day or two apart, the first chick to hatch gets the upper hand in the natural selection process. The larger chick with peck and attack the smaller ones while hoarding the majority of food that the parents bring to the nest.
Oftentimes, the second and third hatching chicks will fail to live past the first few weeks due to their bullying older siblings. You would think the parents might think to intervene, but eagles don't protect the eaglets from each other.
Interestingly, besides the occasional lion, hyenas don't have many natural predators. Therefore, the tendency for cubs to duke it out inside the burrow is quite handy for regulating hyena populations. Unlike most predatory cats, hyenas are born with sharp teeth and eyes wide open, which they use to establish dominance over one another. These brawls start at an early age and last for weeks.
Although the adult hyenas try to separate them, as soon as they are out of sight, the cubs are back at it. Furthermore, the cubs dig tunnels that their mothers can't possibly access to break up the fight. About 25% of hyena cubs are killed in their first month of life.
Although they're virtually harmless to humans, Sand Tiger Sharks are vicious predators towards each other. Female Sand Tiger Sharks have two wombs and each produces many eggs, which hatch while inside the womb. These embryos soon start developing teeth, which they use to kill and eat their brothers and sisters as well as any unfertilized eggs.
The final outcome is only two survivors, one from each womb. This makes the Sand Tiger Shark the only species on the list to kill their siblings before they're born. By the time they are born, these sharks are natural born killers.
Copidosoma floridanum is a parasitoid wasp that's considered one of the worst fratricides in the animal kingdom. An adult paralyzes a caterpillar by stinging it and then injects two eggs into its body, one being male and the other female. The eggs quickly clone themselves through a process called polyembryony, which produces somewhere between 1500-2000 parasitoid larvae. Out of those, females grow larger than their siblings, developing huge jaws.
These asexual demons then seek out their brothers to devour, because only one or two is enough to fertilize their fertile sisters. By doing this, these female wasps are able to ensure there's enough food to go around.