Why did the three brothers travel so far?

African wild dogs must leave their birth pack at two or three years old to find unrelated mates because they cannot breed within the pack they are born into. They either wait and may eventually inherit their pack, or set off in search of a mate. The three brothers covered a straight-line distance of 260 miles but zigzagged through fragmented habitat, covering nearly 2,485 miles in total over eight months. Researchers tracked the animals with GPS collars and published the results in the journal Ecology. These sorts of journeys are known as dispersals, travelling one way in search of a mate, which is a behaviour distinct from migrations where animals move back and forth with the seasons. African wild dogs live in highly social packs, hunt together and are known for their vast roaming in search of new territory and breeding opportunities with other packs. With only about 6,000 remaining in the wild, such movements are essential for genetic exchange between groups. The dogs cannot breed inside their natal pack, making long-distance travel essential for genetic exchange and population viability across eastern and southern Africa.

How did the dogs navigate human landscapes?

The brothers moved between protected areas while avoiding major cities such as Lusaka and industrial zones. They navigated a landscape increasingly shaped by people and avoided obstacles including major cities. Their path linked wildlife strongholds, suggesting eastern and southern African populations remain more connected than previously thought. Perhaps even more significant than the distance itself was the route the wild dogs took through Zambia. Two of three females tracked in a parallel journey died after one was caught in a snare; the surviving dogs repeatedly returned to the same spot, a behaviour linked to the loss of a pack member. The findings suggest wild dog populations across eastern and southern Africa may remain more connected than conservationists previously believed. Professor Scott Creel noted it is plausible to believe that every major wild dog population in eastern and southern Africa, other than fenced ones, are potentially connected through such routes.

What dangers do dispersing wild dogs face?

Illegal snares killed several collared dogs during the study, underlining the dangers they face. With only about 6,000 African wild dogs left in the wild, even small losses affect population viability. The animals roam widely because they cannot breed inside their natal pack, making long-distance travel essential for genetic exchange. Three sisters almost completed an equally epic journey, but stopped when one became trapped in a snare. Researchers identified a pattern in which surviving pack members repeatedly returned to the same location, a behaviour that often signals the death of a companion. Professor Scott Creel noted that while the study provides cautious optimism, in conservation the glass is half empty and the glass is half full, highlighting the threat of poaching snares. Two of the three females died, showing that dispersal remains high-risk even when distances are nearly matched.

How does this journey compare with other long-distance movements?

The dogs’ one-way dispersal differs from seasonal migrations. The UN Convention on Migratory Species identifies Africa's longest migrations as wildebeest moving seasonally between Tanzania and Kenya in search of grazing and water covering more than 400 miles. Globally, caribou undertake the longest single land migrations of any animal, travelling 839 miles in a round trip, while grey wolves have been recorded travelling more than 4,350 miles over a year. The Zambian dogs set the record for the longest known dispersal by any African land mammal. The brothers covered about 260 miles in a straight line over the course of eight months, but travelled nearly 10 times that overall while crossing through a broken-up landscape. This one-way movement in search of mates stands apart from round-trip seasonal journeys and sets a new benchmark for African land mammals.

What conservation measures are recommended?

Authors call for connected strips of natural habitat outside protected areas to link isolated populations. Professor Scott Creel of Montana State University, the paper's lead author who has been studying African wild dogs since 1991, said the study provides cautious optimism. He stated it is plausible to believe that every major wild dog population in eastern and southern Africa, other than fenced ones, are potentially connected. Co-author Bruce Ellender stressed that protected areas cannot function as isolated islands if wide-ranging species are to survive. Species that roam over large areas, such as wild dogs and elephants, need connected landscapes if they are to survive into the future. The research adds weight to calls to create strips of natural land outside protected areas that connect separate wildlife areas broken apart by roads, towns, or farms. Continued collar studies will help determine whether this connectivity persists as human pressure grows.

Frequently asked questions

How many African wild dogs remain in the wild?

Approximately 6,000 individuals survive, making them one of Africa’s rarest large predators.

Why must wild dogs leave their birth pack?

They cannot breed with close relatives, so they disperse at two or three years old to find mates in other packs.

Did any of the tracked females complete a similar journey?

Three sisters nearly matched the distance but stopped when one was caught in a snare; two of the three died.

Where was the study published?

The findings appear in the journal Ecology, based on GPS collar data collected in Zambia.

What practical steps would help the species?

Creating wildlife corridors that connect protected areas and reducing snare use would improve survival during dispersal.