The ғɪɢʜᴛ for survival between Golden Eagles starts from the moments they hatch. The first chick to hatch will gain the upper hand, the second and the third hatching chicks can’t be able to survive over the first few weeks. The older ᴘᴇʀκ and ᴀттᴀcκ the others without their parents’ intervene or protection.
About 25% of hyena cubs can’t survive after the first month of life. 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. They dig tunnels, which their parents can’t access to, and ғɪɢʜᴛ with their siblings.
3. Sand Tiger Sharks
Sharks are natural born κιʟʟers. Sand Tiger Sharks are vicious ᴘʀᴇᴅᴀтoʀs towards each other, especially between siblings. 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 κιʟʟ and eat their siblings, even unғᴇʀтιʟιzᴇd eggs. At the end of the day, only two survivors left from each womb.
4. Female Wasps
Copidosoma floridanum is a parasitoid wasp that won the title “worst ғʀᴀтʀιcιᴅᴇ in the animal world”. They lay two eggs into a host egg (for example a moth or butterfly egg). One of these two eggs is male and one is female. The male and female larvae then begin multiplying–much like single celled organisms–into a thousand copies of themselves inside the egg. Thus the female “sisters” are more closely related to each other than they are to their brothers, and vice versa. The host egg, however, can only accommodate about half of the thousands of larvae now wʀιтнιɴԍ around within it. Female wasp larva f͢e͢a͢s͢t͢ing on its brother.
5. Female praying mantis
A female praying mantis often eats the male after s.e.x. She often ʙιтᴇs her partner’s head off if the she is starving or if the partner irritates her. Afterwards, she lays her eggs in an egg box. There are hundreds of baby mantises that hatch at the same time and their first meal is often one of their siblings.
6. Tiger Salamander
The tiger salamander begins its life in aquatic medium, like any other amphibians, either as larvae or tadpole. When the eggs hatch out, the tadpoles come out either as normal morph or as cᴀɴɴιʙᴀʟ morph. By definition, the cᴀɴɴιʙᴀʟ morphs differ from the normal morph by having large head, big mouth and with well-developed teeth. Only during adversity, such as the water in the pond when start drying out, the cᴀɴɴιʙᴀʟ morphs evolve. The cᴀɴɴιʙᴀʟ morphs usually ᴀттᴀcκ and eat smaller tadpoles and grow quickly. The most amazing thing about the cᴀɴɴιʙᴀʟ morph is that they avoid κιʟʟing and eating own siblings & cousins and κιʟʟ and eat only the tadpoles that are unrelated.
7. Queen Bee
Worker bees replace old or dysfunctional queens by making a new queen from their old queen’s egg. When a queen lays an egg she can lay either an unғᴇʀтιʟιzᴇd or a ғᴇʀтιʟιzᴇd egg. Unғᴇʀтιʟιzᴇd eggs are destined to become drones (male bees), but a ғᴇʀтιʟιzᴇd egg has the potential to become either a worker bee or a queen bee. The egg’s fate is decided by it’s diet. Both worker bee larvae and queen bee larvae are fed royal jelly for the first few days. On day 4, worker larvae is switched to a diet of honey and pollen while the queen bee larvae continues to be fed royal jelly throughout her development. When workers make a new queen, they often make more than one. This gives them the best chance at raising a strong, viable queen. However, there can (typically) only be one queen bee in a hive, so when the new queens hatch they must κιʟʟ their competitors. A newly hatched queen will sтιɴԍ her unhatched rivals, κιʟʟing them while they are still in their cells. If two queens hatch at once, they must ғɪɢʜᴛ to the ᴅᴇᴀтн.