31. As such it can and does freely interbreed with populations of red jungle fowl. 32. This bird interbreeds with the collared towhee where their ranges overlap in southwestern Mexico. 33. Meanwhile, some interested sheepbreeders continued to interbreed and select very strongly for fertility. 34. The borders between the four subspecies are not sharp, because the subspecies interbreed . 35. Where they are sympatric, the lineages interbreed . 36. Xed and the early hominids interbreed to create a new species : modern man. 37. The two species may be able to interbreed . 38. If individuals can interbreed and produce fertile offspring, they belong to the same species. 39. The inability to interbreed is a primary way of separating living animals into distinct species. 40. Previous research suggested that the three known subgroups of Anopheles gambiae don't interbreed .
