Misc: What city was destroyed by Little Boy?

Questions

Common name for three or four species of large trees native to mountainous areas of north africa & asia?

Common name for two different members of the deer family?

Common name for two families of true (two-winged) flies, the larvae of what feed on fresh or decaying vegetable matter?

Common name for white soft limestone?

Common name given to several unrelated groups of seed-eating birds including the true finches, the hawaiian honeycreepers (honeycreeper), & a family of tiny birds of tropical & subtropical areas of eurasia?