In this article, I review recent work from comparative psychology, highligh
ting several conceptual and methodological insights drawn from comparative
research and exploring their value to an ecological approach to behavioral
development. In particular, I consider examples of a major focus of compara
tive psychology, the search for developmental mechanisms and processes unde
rlying the expression of species-typical behavior. This focus has provided
several insights regarding behavioral development that have supported an ec
ological approach and provided a richness and depth of perspective on behav
ior complementary to that found in ecological psychology. Specifically, I r
eview the related notions of probabilism, equifinality, nonlinearity, and d
istributed control and discuss their applicability to and support of ecolog
ical theory.