Taken from:
http://myth-drannor.net/DlabraddathNet/ ... quatic.htm
Physical and Mental Characteristics
Half- drow have the white or silver hair of their elven fathers, but their skins are not the polished obsidian of a full drow - they are a dusky grey. Their eye- colour takes after the human ethnic group of their mothers so can be a wide range of colours. The Drow of Toril are smaller than the other elves, and Faerunian half-drow are closer in physique to the half elves of other worlds than to the common half elf.
Half-drow have the keen eyesight and sharp hearing of all half elves, but their eyesight is particularly good in low light or even darkness.
Distribution
A half-drow is almost always the product of a male drow and a human mother, as the result of planned breeding with salves or rape during raids and wars. As you would expect they are much more common in areas that have suffered drow raids, and it is here you may find the bands of half-drow. However the numbers are small and Dambrath in the far south is the only place where a true half-drow community exists.
A female drow who is raped by a man and carrying a half-drow child has shown her weakness, and her child is the product of an act that is an abomination to the haughty drow. The baby will be killed, and it is highly likely the mother will be killed. Vulnerable drow females simply do not survive.
It is conceivable that a renegade female drow who has turned her back on the evil drow way could take a human partner, and raise a half drow child. However there is no record of this happening and if they do exist, such families must be incredibly rare.
Culture and Outlook
Broadly speaking there are two types of half-drow. The first are bred on human slaves in drow cities. These are raised in an odd half-way position. They are superior to the human and other slaves, but are treated with disdain by the pure-blood drow. Perhaps it is the taint of aggressive and ambitious drow blood that leads them to react to this with anger and bitterness; or maybe it is the effect of the cold and evil way of life in drow cities.
Those drow who are the product of rape are brought up by their mothers in surface human communities. The shame of their violent conception and their tainted drow blood have led many to turn their back on all that is evil. These good hearted half-drow are almost all followers of Eilestraee who plays a special role in helping them reject evil.
Others become resentful. They may become loners who shun friendship, and forever feel that they do not belong. Less commonly some seek out others of their kind and form bands of half-drow who become bandits and thugs.
Age Table:
Adulthood: 20
Middleage: 62
Old: 93
Venerable: 125
Max Age: 130 - 190