Ahhh. . .the mascot for Chinese adoptions.
They are considered lucky because several years ago, when the China's international program was really taking off and there were a lot of adoptive parents waiting for their referrals, there was an infestation of ladybugs. After the ladybugs started taking over there was a huge wave of referrals of children for these adoptive parents. So it is now believed good luck to see a ladybug and that your referral will be coming shortly.
Even though they are red, the ladybugs have no root in Chinese culture.