Major Study: Cross-Species "Talk" Is Flexible and Adaptive
A review with 58 authors published in Animal Behaviour shows that the signals different animal species use to cooperate depend on ecological context and can be learned, not only inherited.
- A review with 58 authors was published in Animal Behaviour and announced around June 20.
- The signals species use to cooperate are not fixed; they depend on ecological context and the species involved.
- The study grew out of a 2023 workshop in Cambridge that brought together anthropologists, biologists and linguists.
- Communication helps partners coordinate timing and limit "cheating."
A team of 58 authors from anthropology, biology and linguistics has published a review in the journal Animal Behaviour on how different animal species communicate in order to cooperate. The paper, titled “The ecology and evolution of cues and signals in animal interspecies cooperation,” was announced around June 20 and grew out of a workshop held in Cambridge in 2023. Its central message is restrained but striking: the signals species use to reach one another are not written in stone, but flexible and adaptive.
Cooperation between species is not rare. Animals of different kinds forage together, clean parasites off one another and warn of danger. A bird perched on a mammal’s back removing ticks, or a cleaner fish servicing larger fish, are examples of relationships in which both sides gain something. What this paper foregrounds is the question of how partners exchange information at all, and how open that exchange is to change.
What does it mean for a signal to be “flexible”?
The authors distinguish between cues and true signals, and stress that the mode of communication depends on three things: the ecological context, which species are involved, and whether a given behavior is inherited or learned. That distinction matters. If a signal is purely inherited, it changes slowly, over many generations. If it is learned, it can adapt far faster, even within a single lifetime.
According to the paper, communication between species performs several practical jobs. It helps partners coordinate timing, recognize who is a reliable collaborator, and limit so-called cheating, where one side takes the benefit without providing the service. Without a way to “say” who is willing to cooperate, such relationships would be hard to sustain. The signals, then, are not mere decoration but a mechanism that holds the whole system together.
It is worth noting that this is a review paper that gathers existing findings across several disciplines, not a single new experiment with a clearly defined sample. That is its strength, since it links anthropology, biology and linguistics, but also its limit. A review spanning many species and contexts necessarily works with evidence of varying quality, so conclusions about what is learned versus inherited should be read as a framework for further research, not a final answer for each species individually.
Why does this matter for understanding cooperation?
If signals between species can be learned and shifted to fit context, then cooperation in nature is not mere mechanics of instinct. It resembles a system that tunes itself, in which partners respond to one another and to their surroundings. That opens concrete questions for future field and laboratory studies: how quickly learned signals spread through a population, how stable they remain when conditions change, and where exactly the line falls between what is written into genes and what is passed on by learning.
What the paper does not prove is that all species communicate the same way, or that every signal is learned. This is a general framework drawn from a review of the literature, not a claim that holds for every individual relationship. The question that stays open is simple: the next time you see a bird on the back of a large animal, how much of what passes between them is inherited, and how much is learned?
