Finches recognise individuals of their species based on appearance and songs. More specifically, finches differences in appearance that they can recognise include the body colour, size and shape. Concerning the songs that they sing, they are significant differences between the song that each species sing.
<span>Yes, if the photo receptor cells and simple eyes that preceded it were useful to the animals in which they arose.</span>
D a medium sized star because the largest star is canis majoris and the smallest star is brown dwarf..☺
