A common mating strategy amongst females is to secure good genes for her offspring, ideally from a male that is also a reliable long-term provider. Since males like that are rare, many females have to make trade-offs.

This family, as noted above, contains a majority of bathophilous species, although rare littoral forms belonging to it have been described.

Away up the gorge all diurnal fancies trooped into the wide liberties of endless luminous vistas of azure sunlit mountains beneath the shining azure heavens, the ranges and valleys changing with every mood of the atmosphere, with the harlequinade of the clouds and the wind.

The instant the alarm went off, he fled the building.