The differences in social behaviour and habitats have historically prevented interspecific hybridisation, but it may occur when both species are confined within the same area, and the offspring are usually fertile.
As diferenzas en comportamento social e hábitats historicamente impediron a hibridación interespecífica, porén pode ocorrer cando ambas as especies están confinadas dentro da mesma zona, e a descendencia é xeralmente fértil.