Presenting flowers to The Queen outside Brisbane City Hall, 1954. This is a 'bob' curtsey as used by young girls, and by maids in grand houses.

Full curtsey or obeisance, suitable when presented to a monarch on a formal occasion. Notice the back is straight, and the head is not bowed. Rarely seen in modern times

A variation, a kind of mixture of a curtsey and a bow

A curtsey (also spelled curtsy or courtesy) is a traditional gesture of greeting, in which a girl or woman lowers her body by bending her knees. It is the female equivalent of male bowing in European cultures. The word "curtsy" comes from "courtesy" which means "politeness".