Hymenoptera

Description:

<from wikipedia>Hymenoptera is one of the largest orders of insects, comprising the sawflies, wasps, bees and ants. There are over 130,000 recognized species.Hymenoptera are very small to large insects, usually with two pairs of wings. Their mouthparts are adapted for chewing, with well-developed mandibles (ectognathous mouthparts). Many species have further developed the mouthparts into a lengthy proboscis, with which they can drink liquids, such as nectar. They have large compound eyes, and typically three ocelli.

Notes:

i found it at playground near my home. It's yellow and black, can fly and eat some liquid in the flower.