Agama anchietae is one of eight species of agama found in Namibia, its distribution range in the upper half of the country covers desert, Karoo and savannah type biomes and overlaps with that of some of its congeners. Here, we describe its sexual dimorphism, reproductive traits, predation, diet and nematode infection, and compare and contrast each aspect among the three biomes as well as to published findings for three other Namibian congenerics, Agama etoshae , Agama aculeata aculeata and Agama planiceps planiceps . Interesting similarities and differences were found among the biomes as well as with the three congenerics. Our hypothesis that the aspects studied in A. anchietae would be more in line with those of A. a. aculeata and A. etoshae , with which it shares similarities in body colouration, social organisation and microhabitat utilisation, was only partially confirmed. This cautions against using morphological and ecological similarities between agamas as proxies for making life‐history strategy inferences.