Deceased

Slit Lip

Also known as Slitlip · The Fallen Inselberg

c. 2013/14 – July 2022

Born in Serengeti National Park, Tanzania (believed)

Slit Lip was one of the five Inselberg Males, the coalition that crossed from Tanzania’s Serengeti into Kenya’s Mara Triangle around 2018. He was instantly recognisable by his split upper lip, which may have been a birth defect, and by heavy battle scars. Unlike his brothers, he often spent long periods alone with the lionesses, and Angama’s guides frequently found him near the inselbergs that gave the coalition its name.

The Inselberg Males take their name from the inselbergs, isolated rocky hills near the Kenya–Tanzania border in the south of the Mara Triangle. The five are believed to have come from the Serengeti, where fans say they were first filmed in the Lamai area around 2017, and were first recorded on the Kenyan side by the Mara Predator Conservation Programme in 2018. By January 2020 all five held the south of the Triangle, ruling the Nasipa, Egyptian Goose and Purungat prides, among others.

In mid-2022 young rival coalitions began pushing into Inselberg territory: the six Nyati males, specialists in hunting buffalo, and three of the Bila Shaka males were both seen deep inside it. At the end of July 2022 Angama confirmed that Slit Lip was dead, caught alone by rival males. Most accounts blame the Nyati males, who lost one of their own in a clash with the Inselbergs; some fans suspected the Bila Shakas. He was the first of the five to die, at about eight or nine.

Member of the coalition The Inselberg Males View the coalition
~4Years in the Triangle
~8Age at death
1stOf the five to die
5Males in his coalition

Profile

Identity

Name
Slit LipThe name he is best known by
Nicknames
Slitlip, Split-lip
Origin of the name
Named by Mara Triangle guides for his split upper lip
Sex
Male
Distinguishing features
A cleft upper lip, possibly a birth defect; heavy battle scars
Weight
Information not availableFor reference, adult male lions usually weigh 150–260 kg

Birth & Family

Born
c. 2013 – 2014Estimated; not recorded
Birthplace
Serengeti National Park, Tanzania (believed)Fans say the Lamai area of the northern Serengeti
Birth pride
Information not availableNot known
Father
Information not available
Mother
Information not available
Siblings
Manywele, Ruka, Nusu, Olopolosie and Slit Lip (brothers or close relatives)Their relationship has not been documented

Reign

Pride king
Yes, a pride male of the Inselberg coalition
Prides ruled
Nasipa, Egyptian Goose and Purungat prides, among othersRuled with his brothers
Pride size
Information not available
Reign
About 4 years (c. 2018 – 2022)
Ruled with
His Inselberg brothers
Home range
The Mara Triangle, Kenya, from the inselbergs on the border to Serena and Maji Machafu; later across the Mara River
Territory size
Information not available

Death

Died
Late July 2022Angama confirmed his death at the end of July 2022
Age at death
About 8–9 years
Cause of death
Killed by rival male lionsMost likely the Nyati males; some suspected the Bila Shaka males
Place of death
Inselberg territory, southern Mara Triangle, Kenya
Burial
Information not availableNo burial was reported

Names & Meanings

Slit LipName

For his split upper lip. Also written Slitlip or Split-lip.

Family & Lineage

Not knownParentsTheir parents were never identified; they arrived in the Triangle from the Serengeti as adults.
OffspringCubs of the coalitionFathered with his brothers in the Triangle prides, including the Purungat Pride’s sub-adults, noted in 2025 for being almost maneless. In a coalition, which male fathered which cub is not known.

Life Story

  1. c. 2013 – 2014

    Born, believed to be in the Serengeti, Tanzania.

  2. c. 2017

    Reportedly filmed with his brothers in the Lamai area of the northern Serengeti.

  3. 2018

    First recorded with his brothers on the Kenyan side of the border in the Mara Triangle.

  4. January 2020

    All five Inselberg males held the south of the Triangle around the inselbergs.

  5. 2021

    Photographed by Angama’s guides near an inselberg, with a lioness watching him closely.

  6. Mid-2022

    The six Nyati males and three Bila Shaka males pushed deep into Inselberg territory.

  7. Late July 2022

    Angama confirmed he had been killed, caught alone by rival males.

  8. Later in 2022

    The Nyati males took the Egyptian Pride, one of the three prides the Inselbergs had dominated.

Legend & Truth

Who killed him?

Angama’s guides describe a clash between the Inselbergs and the Nyati males in which one male from each coalition died. Three Bila Shaka males were also in the area. No one saw the fight that killed him.

Alone with the prides

Slit Lip often stayed alone with the lionesses while his brothers were elsewhere. It gave him time with the females, but it is also how he was caught without help.

Photographs

Photograph coming soon
Photograph coming soon
Photograph coming soon

Film

The film of Slitlip’s life is coming soon

Animation

An animated story of Slitlip’s life is coming soon

Documentaries & Features

Article2024

The Lions of the Triangle: An Update

Angama Mara

The Inselbergs’ clash with the Nyati males and their move east.

Sources

Where sources disagree, the most widely reported figure is shown, with other reports noted beneath it.