A modular nest including a backing member including a pair of generally opposing leafs connected to a spine and a removable nesting substrate including a plurality of grooves formed on a first face, the plurality of grooves forming a plurality of nesting cavities when the nesting substrate is folded along a line substantially perpendicular to an axis of one of the plurality of grooves, the nesting substrate removably inserted between the pair of generally opposing leafs of the backing member. A nest closure member is adapted for selective engagement for holding the backing member and the nesting substrate in a closed position wherein the plurality of grooves form the plurality of nesting cavities and an open position wherein the nesting substrate is laid open and the plurality of grooves are exposed.