There is disclosed a storage unit for a bee colony comprising a base unit adapted to be positioned on a ground structure. The base unit having a inlet means formed therein for facilitating entry and exit of bees from the unit. At least one box is mountable on the base unit. The or each box comprises at least one pair of end walls mountable between at least one pair of side walls so as to define an internal space into which the bees are to be contained. A lid member is mountable to an uppermost box so as to substantially seal the internal space. The lid member has a plurality of vents formed therein to facilitate ingress and/or egress of air into the internal space. The end walls of each box has an internal surface configured to support a plurality of frame members therebetween so as to extend across the internal space to provide a surface for supporting the bees.