When new males seize control of a lion pride, the females face a cascade of upheaval that touches nearly every aspect of their lives: their cubs are at immediate risk of being killed, their movements shift, their reproductive cycles reset, and some younger females may be driven out entirely. A takeover is one of the most violent and consequential events in the social life of lions, and for females, navigating it is a matter of survival for themselves and their offspring. The process is more complex than the popular image of a single dramatic fight, and the females’ responses reveal a surprising degree of behavioral flexibility.
What a Takeover Looks Like
A pride takeover begins when a coalition of nomadic males challenges the resident males for control of a pride’s territory. These coalitions typically consist of two to six males, often brothers or close relatives who have been roaming together since leaving their own natal pride. The resident males may be outnumbered, aging, or weakened, and a confrontation can range from a brief chase to a prolonged, brutal fight that leaves one or more males dead or severely injured. Once the incoming coalition drives off or kills the residents, they take control of the territory and the females within it.
For the females, this shift is not a choice. They are bonded to the territory more than to any particular set of males. Most female lions remain in their natal pride for their entire lives, with roughly a third emigrating before they reach four years of age, typically when evicted by an incoming male coalition or pushed out by the pride’s adult females after a new litter is born.1Behaviour. The Evolution of Sex-Biased Dispersal in Lions The adult females who stay must contend directly with the new males and whatever behavior those males bring.
Infanticide After a Takeover
The most devastating consequence for females is infanticide. New males routinely kill cubs that were sired by the previous coalition. This is not random aggression; it serves a clear reproductive purpose for the incoming males. A nursing female suppresses ovulation and will not become receptive to mating for months or even a couple of years while raising her current litter. By killing dependent cubs, the new males eliminate that delay. The female stops lactating, returns to estrus within days to weeks, and can then conceive offspring fathered by the new coalition.
Cubs younger than about nine months are the most vulnerable. Older cubs have a somewhat better chance of surviving because they are more mobile and less dependent on their mother’s milk, but they are still at serious risk. The killing is often swift when it happens, though females do attempt to defend their young. A single female is almost always overpowered by an adult male, but groups of females occasionally succeed in driving off an attacker, particularly when they act together.
The loss is not just physical. Females who lose an entire litter to infanticide have effectively wasted months of investment in gestation, nursing, and care. From an evolutionary standpoint, this is an enormous cost, and it has driven several behavioral counter-strategies that researchers have documented over decades of field observation.
How Females Change Their Movements
One of the most striking responses involves where females choose to spend their time. Research in the Hwange ecosystem in Zimbabwe found that females with cubs were significantly less likely to use areas near waterholes or along the edges of the pride’s territory compared to females without cubs.2PubMed Central. Counter-strategies to infanticide: The importance of cubs in determining lion habitat selection and social interactions Waterholes and territory borders are places where encounters with unfamiliar males are most likely, so avoiding them reduces the chance that cubs will be discovered and killed.
This spatial avoidance comes at a cost. Waterholes attract prey, and staying away from them can mean less efficient hunting. Territory edges also provide hunting opportunities as prey move between ranges. A mother with young cubs essentially trades foraging quality for cub safety, accepting a nutritional penalty in exchange for reducing encounter risk with dangerous males. Once cubs grow large enough to be less vulnerable, females gradually return to using the full range of the territory.
This behavior is not limited to takeover periods. Any time unfamiliar males are detected in or near the territory, mothers with dependent cubs adjust their movements. But takeovers represent the most extreme version of this pressure, because the unfamiliar males are not passing through; they are staying and actively patrolling the territory.
The Fate of Subadults and “Delayed Infanticide”
Infanticide is usually discussed in terms of small cubs, but a takeover also has severe consequences for older offspring. Subadult lions, those roughly one to three years old, are too large to be killed outright as easily as a small cub, but they face a different kind of threat. New males are hostile toward them because they are not their offspring, and this hostility often drives subadults out of the pride prematurely.
Research from the Serengeti has documented what has been described as “delayed infanticide.” When new adult males arrived, subadults dispersed from the pride regardless of their age or body condition. All males that dispersed before reaching about 31 months of age died during the transient period, the vulnerable interval between leaving one pride and either joining another or establishing their own territory.3Oikos. Social relationships affect dispersal timing revealing a delayed infanticide in African lions In other words, the takeover did not kill these young lions directly, but it forced them into a situation where death was almost certain. The researchers argued this amounts to a form of infanticide that is simply displaced in time.
For females, watching subadult offspring get pushed out is another layer of reproductive loss. These are individuals the mother has invested years in raising. If they are forced to disperse too young and die as a result, the mother’s entire investment is lost just as surely as if the offspring had been killed as a cub. Young females in the pride are not immune to this pressure either. While most females stay in the natal pride, some are evicted by incoming males, particularly when the pride is already large and the new males have no reason to tolerate extra mouths competing for prey.
Returning to Estrus and Mating With New Males
After losing cubs, a female typically returns to reproductive cycling within a few weeks. If her cubs survive the takeover, either because they are old enough to escape infanticide or because the female successfully defends them, she will not mate with the new males until her current litter is weaned. But when cubs are killed, the biological clock resets quickly.
Females do mate with the new coalition males, and they do so without an extended courtship period. From a human perspective, this can seem jarring, but the female’s reproductive interests are not aligned with loyalty to a previous mate. Her evolutionary priority is producing surviving offspring, and with the new males now controlling the territory, any cubs she raises will need the protection of those males to survive. Refusing to mate would not bring back dead cubs; it would only delay the female’s next chance at successful reproduction.
Interestingly, females within a pride often come into estrus around the same time after a takeover, because many of them lost cubs simultaneously. This synchronization of reproductive cycling means that multiple females in the pride conceive at roughly the same time. The resulting litters are then born close together, which sets the stage for communal cub-rearing.
Communal Denning and Cooperative Defense
One of the most effective tools females have against future threats to their cubs is communal nursing and group defense. When several females give birth around the same time, they often pool their cubs into a shared crèche. Mothers take turns guarding the young while others hunt. This arrangement dilutes the individual risk: a predator or an infanticidal male approaching the group faces multiple adult females rather than a lone mother.
The benefits of raising cubs at a communal den appear to outweigh the risks. Research on large social carnivores has found that social integration at communal dens provides developmental benefits for cubs, even though grouping also means more potential for within-group conflict.4bioRxiv. Infanticide by females is a leading source of juvenile mortality in a large social carnivore In lions specifically, communal rearing allows cubs to grow up in a social environment where they learn hunting cooperation, develop hierarchies, and gain protection through numbers. Females related to each other, as pride females typically are, cooperate especially closely in defense of the group’s young.
Group defense does not always work. A determined coalition of males will overpower even a coordinated group of females, especially if the coalition is large. But the additional cost and risk of confronting several angry females can deter opportunistic attempts, particularly from lone males or small coalitions testing the boundaries of a territory. The communal approach is less about guaranteeing safety and more about shifting the odds.
Deception and Reproductive Tactics
Females are not entirely passive in the face of a takeover. Some behavioral observations suggest that females employ tactics that could be classified as reproductive deception, though the evidence for these is less ironclad than for spatial avoidance or communal defense.
One documented behavior is pseudo-estrus, in which a female appears to signal sexual receptivity and mates with a new male even though she is already pregnant by the previous coalition. If the new male believes a cub could be his, he may be less inclined to kill it. The effectiveness of this strategy depends on timing. If the female is early enough in pregnancy that the birth could plausibly result from a mating with the new male, the deception might hold. If the cub is born too soon after the takeover, the ruse falls apart.
Another tactic is simply hiding. Females with very young cubs sometimes leave the pride temporarily and raise their litter in isolation for the first several weeks. This is risky because a lone female with cubs is more vulnerable to hyenas and other predators, and she must hunt alone. But if the alternative is near-certain infanticide by new pride males, temporary isolation can be the better gamble. Females rejoin the pride once their cubs are larger and the new males have settled into their tenure and are less likely to kill older cubs they have been around for a while.
How Long the Disruption Lasts
A takeover does not produce a single shock that fades quickly. The destabilization can affect a pride’s reproductive output for a year or more. Cubs lost to infanticide represent months of wasted gestation and nursing. Females that need to cycle back into estrus, conceive, and carry a new pregnancy to term will not have surviving cubs for roughly another eight months after mating (lion gestation is about 110 days, plus the weeks it takes to return to estrus after losing a litter). If the first post-takeover litter fails for any reason, the delay extends further.
The new males, meanwhile, are on their own clock. A coalition typically holds a pride for two to four years before being displaced by the next group of challengers. That means the window for siring cubs and seeing them through to independence is short. This urgency is what drives the infanticidal behavior in the first place: every month a new male spends tolerating another male’s cubs is a month subtracted from his own reproductive tenure.
For the pride as a whole, frequent takeovers can be devastating. If males change every couple of years, females may lose litter after litter, and cub survival rates plummet. Stable coalitions that hold a pride for longer periods allow females to raise more cubs to independence, which is why large, strong coalitions are indirectly beneficial to the females they control, even though the initial takeover is destructive.
When Females Leave the Pride Entirely
Not all females endure a takeover by staying put. As noted earlier, about a third of female lions emigrate from their natal pride before reaching four years of age, with eviction by incoming males being one of the primary triggers.1Behaviour. The Evolution of Sex-Biased Dispersal in Lions These emigrants face difficult prospects. A lone female or a small group of sisters must find unoccupied territory or attempt to join an existing pride, neither of which is easy.
Females that leave typically settle on the margins of established pride territories or in buffer zones between prides. Their survival and reproductive success tend to be lower than that of females who remain in a stable pride, at least initially. Over time, a group of dispersed females can establish a new pride if they find adequate territory and attract a coalition of males, but this process can take years and many do not survive long enough to see it through.
The decision to leave versus stay is not entirely voluntary. Younger females without strong social bonds to the pride’s dominant females are more likely to be pushed out. In large prides, existing females may even actively drive out younger or less-related females around the time of a takeover, consolidating resources for their own offspring. The social dynamics within the female group are more competitive than the popular image of a harmonious sisterhood suggests.
What Trophy Hunting and Human Activity Change
In populations affected by trophy hunting or human-wildlife conflict, the dynamics of pride takeovers become more frequent and more damaging. When a resident male is killed by a hunter, the effect on the pride is functionally identical to a natural takeover: new males move in, cubs die, and the reproductive cycle resets. The difference is that human-caused removal of males can happen at rates far higher than natural turnover, meaning prides experience the disruption more often.
Research tracking subadult dispersal found that the arrival of unfamiliar males was the key trigger for premature departure, regardless of the young lions’ physical readiness.3Oikos. Social relationships affect dispersal timing revealing a delayed infanticide in African lions When male turnover is artificially accelerated through hunting, the cascading effects of delayed infanticide and forced dispersal multiply. Conservation programs in several African countries have responded by imposing age-based hunting restrictions, aiming to protect males that are still actively guarding prides and their dependent cubs. The goal is to allow males to complete a natural tenure before they become available for harvest, reducing the number of artificial takeovers that females must endure.
Habitat fragmentation adds another layer of difficulty. In smaller, fenced reserves, the pool of potential male coalitions is limited. When a takeover happens in a confined population, there may be nowhere for evicted females or subadults to go. Managers of these reserves sometimes intervene by relocating males or introducing new genetic stock, effectively managing the takeover process to prevent the most extreme consequences for females and cubs. These interventions are imperfect, but in small populations they can mean the difference between a pride recovering and a pride collapsing.
Females With Cubs Alter Social Interactions Too
Beyond changing where they go, mothers with cubs also change how they interact with other lions. The same Hwange study that documented spatial avoidance found that the presence of cubs influenced not just habitat selection but social behavior more broadly.2PubMed Central. Counter-strategies to infanticide: The importance of cubs in determining lion habitat selection and social interactions Mothers became more cautious about associating with certain pride members and adjusted their proximity to other adults depending on the perceived threat level.
This social caution extends to how females interact with the new males once a takeover is complete. In the early days of a new coalition’s reign, females tend to be wary and avoidant, keeping distance and vocalizing less. Over weeks and months, as the new males establish routine patrols and begin associating with the pride regularly, females gradually re-engage. The process is not instantaneous trust; it is a slow thaw driven by repeated non-aggressive encounters. Males that are excessively aggressive toward adult females risk being met with coordinated resistance from the female group, which can occasionally drive a poorly bonded coalition away from a pride entirely.
The relationship between pride females and their coalition males, once established, settles into a pattern of mutual tolerance rather than affection. Males patrol and defend the territory, which benefits the females by keeping rival coalitions and other threats at bay. Females do the majority of hunting and cub-rearing. The arrangement is functional rather than bonded in the way many people imagine from wildlife documentaries, and when the next takeover comes, the cycle begins again.