By David Western

Introduction

In July we posted a report on the excellent outlook for pastures, livestock and wildlife in dry season extending from July through to the short rains in October. Good short rains in 2024, off-season rains in the January to March dry season, and heavy long rains saw Amboseli pastures recover from the 2022 drought.

The failure of the short rains in October and November, and heavy grazing following the recovery of livestock herds from the 2022 drought, have reversed the gains. The outlook for the coming dry season is severe.

The NDVI greenness maps across southern Kenya and northern Tanzania (Figure 1) show how rapidly conditions have deteriorated since the long rains in April-May. Pastures are heavily grazed across the lowland regions from Tsavo West, through Amboseli, into the Rift Valley and across northern Tanzania. Pastures abundance has fallen steeply from the green zone into the red (Figure 2).

Our monitored plots show bare soil, weathered shrubs, and almost no remaining dry leaf matter. Livestock body condition has dropped sharply, milk yields are extremely low, herders are chasing the scattered green flushes, and livestock prices are falling fast.

Wildlife is faring somewhat better than livestock. This is seen in the delayed drop in body condition (Figure 6) due to the far smaller wildlife numbers and greater pasture reserves in Amboseli and Chyulu National Parks. As in the 2022 drought, a large influx of cattle into the national parks could see wildlife body condition drop steeply in the coming dry season.

The sharp decline in pasture and animals condition stems from the extremely heaving grazing pressure following livestock recovery from the 2022 drought. The rapid deterioration in rangelands conditions is shown in the grazing pressure measure in our monthly pasture plots (Figure 3).

Unless delayed rains in December offer some relief, the January to March dry season will spell severe conditions for families depending on livestock and farmers bordering the pastoral lands. ACP is therefore posting an early warning alert for herders to be prepared to buy in hay before prices escalate sharply, and sell livestock before market prices drop steeply.

In the following report we detail the conditions which sound our early warning alert. We also comment on the outlook for the rangelands in the coming months, and the action needed to avert a repeat of the 2009 and 2022 droughts.

 

 Figure 1: NDVI maps show how vegetation greenness has changed across the Amboseli
ecosystem and the neighbouring areas of northern Tanzania since the April-May long rains. The
October-November rains have been too poor and patchy to restore depleted pastures, body
condition, milk yields and market prices.

 

 Figure 2: The Amboseli Pasture Barometer shows forage biomass falling steeply in recent
months. The decline from good to poor conditions has accelerated faster than any time in the
past fifty years–despite an increase in peak rainfall since 2017.

By David Western

November 27, 2025

The handing back of Amboseli National Park to Kajiado County management on 8th November 2025

By ACP Team

July 26, 2025

Our Amboseli Conservation Program Outlook Report gives the state of pastures, livestock, and wildlife health.

By Victor Mose

June 9, 2025

Horizontal learning, where local communities and scientists co-design research, remains a central pillar of Mosaic

Early Warning of a Harsh Dry Season in Amboseli

Authored by : David Western
Posted on December 5, 2025

Introduction

In July we posted a report on the excellent outlook for pastures, livestock and wildlife in dry season extending from July through to the short rains in October. Good short rains in 2024, off-season rains in the January to March dry season, and heavy long rains saw Amboseli pastures recover from the 2022 drought.

The failure of the short rains in October and November, and heavy grazing following the recovery of livestock herds from the 2022 drought, have reversed the gains. The outlook for the coming dry season is severe.

The NDVI greenness maps across southern Kenya and northern Tanzania (Figure 1) show how rapidly conditions have deteriorated since the long rains in April-May. Pastures are heavily grazed across the lowland regions from Tsavo West, through Amboseli, into the Rift Valley and across northern Tanzania. Pastures abundance has fallen steeply from the green zone into the red (Figure 2).

Our monitored plots show bare soil, weathered shrubs, and almost no remaining dry leaf matter. Livestock body condition has dropped sharply, milk yields are extremely low, herders are chasing the scattered green flushes, and livestock prices are falling fast.

Wildlife is faring somewhat better than livestock. This is seen in the delayed drop in body condition (Figure 6) due to the far smaller wildlife numbers and greater pasture reserves in Amboseli and Chyulu National Parks. As in the 2022 drought, a large influx of cattle into the national parks could see wildlife body condition drop steeply in the coming dry season.

The sharp decline in pasture and animals condition stems from the extremely heaving grazing pressure following livestock recovery from the 2022 drought. The rapid deterioration in rangelands conditions is shown in the grazing pressure measure in our monthly pasture plots (Figure 3).

Unless delayed rains in December offer some relief, the January to March dry season will spell severe conditions for families depending on livestock and farmers bordering the pastoral lands. ACP is therefore posting an early warning alert for herders to be prepared to buy in hay before prices escalate sharply, and sell livestock before market prices drop steeply.

In the following report we detail the conditions which sound our early warning alert. We also comment on the outlook for the rangelands in the coming months, and the action needed to avert a repeat of the 2009 and 2022 droughts.

 

 Figure 1: NDVI maps show how vegetation greenness has changed across the Amboseli
ecosystem and the neighbouring areas of northern Tanzania since the April-May long rains. The
October-November rains have been too poor and patchy to restore depleted pastures, body
condition, milk yields and market prices.

 

 Figure 2: The Amboseli Pasture Barometer shows forage biomass falling steeply in recent
months. The decline from good to poor conditions has accelerated faster than any time in the
past fifty years–despite an increase in peak rainfall since 2017.

By David Western

Introduction

In July we posted a report on the excellent outlook for pastures, livestock and wildlife in dry season extending from July through to the short rains in October. Good short rains in 2024, off-season rains in the January to March dry season, and heavy long rains saw Amboseli pastures recover from the 2022 drought.

The failure of the short rains in October and November, and heavy grazing following the recovery of livestock herds from the 2022 drought, have reversed the gains. The outlook for the coming dry season is severe.

The NDVI greenness maps across southern Kenya and northern Tanzania (Figure 1) show how rapidly conditions have deteriorated since the long rains in April-May. Pastures are heavily grazed across the lowland regions from Tsavo West, through Amboseli, into the Rift Valley and across northern Tanzania. Pastures abundance has fallen steeply from the green zone into the red (Figure 2).

Our monitored plots show bare soil, weathered shrubs, and almost no remaining dry leaf matter. Livestock body condition has dropped sharply, milk yields are extremely low, herders are chasing the scattered green flushes, and livestock prices are falling fast.

Wildlife is faring somewhat better than livestock. This is seen in the delayed drop in body condition (Figure 6) due to the far smaller wildlife numbers and greater pasture reserves in Amboseli and Chyulu National Parks. As in the 2022 drought, a large influx of cattle into the national parks could see wildlife body condition drop steeply in the coming dry season.

The sharp decline in pasture and animals condition stems from the extremely heaving grazing pressure following livestock recovery from the 2022 drought. The rapid deterioration in rangelands conditions is shown in the grazing pressure measure in our monthly pasture plots (Figure 3).

Unless delayed rains in December offer some relief, the January to March dry season will spell severe conditions for families depending on livestock and farmers bordering the pastoral lands. ACP is therefore posting an early warning alert for herders to be prepared to buy in hay before prices escalate sharply, and sell livestock before market prices drop steeply.

In the following report we detail the conditions which sound our early warning alert. We also comment on the outlook for the rangelands in the coming months, and the action needed to avert a repeat of the 2009 and 2022 droughts.

 

 Figure 1: NDVI maps show how vegetation greenness has changed across the Amboseli
ecosystem and the neighbouring areas of northern Tanzania since the April-May long rains. The
October-November rains have been too poor and patchy to restore depleted pastures, body
condition, milk yields and market prices.

 

 Figure 2: The Amboseli Pasture Barometer shows forage biomass falling steeply in recent
months. The decline from good to poor conditions has accelerated faster than any time in the
past fifty years–despite an increase in peak rainfall since 2017.

By David Western

November 27, 2025

The handing back of Amboseli National Park to Kajiado County management on 8th November 2025

By ACP Team

July 26, 2025

Our Amboseli Conservation Program Outlook Report gives the state of pastures, livestock, and wildlife health.

By Victor Mose

June 9, 2025

Horizontal learning, where local communities and scientists co-design research, remains a central pillar of Mosaic

Posted on December 5, 2025

By David Western

Introduction

In July we posted a report on the excellent outlook for pastures, livestock and wildlife in dry season extending from July through to the short rains in October. Good short rains in 2024, off-season rains in the January to March dry season, and heavy long rains saw Amboseli pastures recover from the 2022 drought.

The failure of the short rains in October and November, and heavy grazing following the recovery of livestock herds from the 2022 drought, have reversed the gains. The outlook for the coming dry season is severe.

The NDVI greenness maps across southern Kenya and northern Tanzania (Figure 1) show how rapidly conditions have deteriorated since the long rains in April-May. Pastures are heavily grazed across the lowland regions from Tsavo West, through Amboseli, into the Rift Valley and across northern Tanzania. Pastures abundance has fallen steeply from the green zone into the red (Figure 2).

Our monitored plots show bare soil, weathered shrubs, and almost no remaining dry leaf matter. Livestock body condition has dropped sharply, milk yields are extremely low, herders are chasing the scattered green flushes, and livestock prices are falling fast.

Wildlife is faring somewhat better than livestock. This is seen in the delayed drop in body condition (Figure 6) due to the far smaller wildlife numbers and greater pasture reserves in Amboseli and Chyulu National Parks. As in the 2022 drought, a large influx of cattle into the national parks could see wildlife body condition drop steeply in the coming dry season.

The sharp decline in pasture and animals condition stems from the extremely heaving grazing pressure following livestock recovery from the 2022 drought. The rapid deterioration in rangelands conditions is shown in the grazing pressure measure in our monthly pasture plots (Figure 3).

Unless delayed rains in December offer some relief, the January to March dry season will spell severe conditions for families depending on livestock and farmers bordering the pastoral lands. ACP is therefore posting an early warning alert for herders to be prepared to buy in hay before prices escalate sharply, and sell livestock before market prices drop steeply.

In the following report we detail the conditions which sound our early warning alert. We also comment on the outlook for the rangelands in the coming months, and the action needed to avert a repeat of the 2009 and 2022 droughts.

 

 Figure 1: NDVI maps show how vegetation greenness has changed across the Amboseli
ecosystem and the neighbouring areas of northern Tanzania since the April-May long rains. The
October-November rains have been too poor and patchy to restore depleted pastures, body
condition, milk yields and market prices.

 

 Figure 2: The Amboseli Pasture Barometer shows forage biomass falling steeply in recent
months. The decline from good to poor conditions has accelerated faster than any time in the
past fifty years–despite an increase in peak rainfall since 2017.

Recent Posts

By David Western

December 5, 2025

Short rains failed in Oct to Nov 2025 and heavy post-drought stocking pushed pastures from green to red.

By David Western

November 27, 2025

The handing back of Amboseli National Park to Kajiado County management on 8th November 2025

By ACP Team

July 26, 2025

Our Amboseli Conservation Program Outlook Report gives the state of pastures, livestock, and wildlife health.

By Victor Mose

June 9, 2025

Horizontal learning, where local communities and scientists co-design research, remains a central pillar of Mosaic

By ACP Team

May 6, 2025

We are delighted to present the inaugural issue of Eseriani, a new magazine dedicated to exploring well-being

By David Western, David Maitumo, Victor N. Mose, Julius Muriuki and Glen P. Mitema

March 14, 2025

Amboseli became world renowned in the 1950s as the setting for Where No Vulture’s Fly

By David Western, Victor N. Mose, David Maitumo, Immaculate Ombongi, Sakimba Kimiti, Winfridah Kemunto, Samuel Lekanaiya, Paul Kasaine and Sunte Kimiti

February 7, 2025

The outlook for livestock and wildlife in the short dry season normally stretching from January to the long rains

By Victor N. Mose

January 28, 2025

ACP, ACC, and NAU launched a NASA-funded One Health survey using GEDI and local monitoring for ecosystem health.

By David Western, Victor N. Mose, David Maitumo, Immaculate Ombongi, Sakimba Kimiti, Winfridah Kemunto, Samuel Lekanaiya, Paul Kasaine and Sunte Kimiti

November 30, 2024

The heavy prolonged El Niño rains boosted pastures across the Amboseli ecosystem

By David Western, Immaculate Ombongi and Victor N. Mose

November 30, 2024

Our study traces the transition from traditional livestock practices based on seasonal migrations to permanent

Contact Us

Amboseli Conservation Program
P.O Box 15289-00509 or 62844-00200
Nairobi, Kenya.

Tel/Fax: +254 20 891360 / 891751
Email: acc@acc.or.ke