It depends on the species, and there are too many to list. Female finches are duller in color than their mates, suffice it to say. Consult a field guide for more info on finches.
Baby finches aren't fertilized until they've become adult finches. Female adult finches, like most birds, are fertilized through something called a "cloacal kiss".
Yes
yes they do
Finches are colorful birds, the males especially. Check a field guide for species description.
finches are colorful birds.depending on species,they can be yellow,red,blue, purple,black,whie,or a variety of colors.
Depends on the color... cool colors mean male and warm colors mean female
Darwin was interested in the finches! The finches weren't interested in him!
yes. it is possible. simply pick up the male, put him in female cage, close the latch, and let the romance begin
Male and female society finches are identical in appearance, but not in behaviour - however, to discover whether yours is male or female (assuming you only have the one) you'll need to intoroduce it to another society finch known to be female. Males will conduct a distinctive courtship dance during which he will fluff up his feathers and bounce up and down on the perch, whereas females will not. There's a picture of a male (with the darker colouring of the wild bird rather than the light feathers that your domesticated bird may have) engaged in the dance at http://www.efinch.com/birdpixchocpiedsoc.jpg
That they were evoled from on specie of finches.
white
Mostly House finches. Hous Finches are usually the most seen around bird feedes but there are also, orange Finches