Masked and White-browed Woodswallows mingle freely together for much of their lives, particularly in inland eastern Australia. In W.A., the White-brows are rarer and Masked predominate but in the eastern states, the closer you go to the coast you'll see more White-browed with only the odd Masked bird in the migrating flocks. Details of their life histories are very similar and summarised under White-browed Woodswallow. Whilst male Masked are quite distinctive looking, females are much duller looking and can easily be confused with Black-faced Woodswallows.

Apparent hybrid individuals which exhibit intermediate characters between Masked and White-browed are fairly well-known, not all that unexpected in such closely related birds, (See pic #544204D.) but actual instances of a mixed pair nesting have never been observed.