1) Bird family 2) Family struthionidae 
Struthionidae is a family of flightless ratite birds which first appeared during the Eocene epoch. It is today represented by the sole living genus Struthio, but also contains several extinct genera. ...
Struthionidae is the Bustard family of birds of the order Gallinae. They are devoid of a hind toe, have unarmed tarsi and very short wings.
[n] - tall terrestrial birds: ostriches
family Struthionidae noun tall terrestrial birds: ostriches