Abstract: A bird feeder includes a tubular container for bird food and a removable base engageable with projections at a lower end thereof to retain it in place to form the bottom of the container. The base has an upper part in the form of a plug insertable into the container and a lower part having an annular outer part on which the upper part can rotate, and includes locking mechanism projections selectively locked into slots in the upper part by rotation. The projections can be disengaged from the slots in a first rotational position and are locked into the slots in a second rotational position, respectively. The upper and lower parts of the base can be separated from one another with a relative rotation between a first, locked position and a third, disengaged.

Abstract: A bird feeder includes a tubular container for bird food and a removable base engageable with projections at a lower end thereof to retain it in place to form the bottom of the container. The base has an upper part in the form of a plug insertable into the container and a lower part having an annular outer part on which the upper part can rotate, and includes locking mechanism projections selectively locked into slots in the upper part by rotation. The projections can be disengaged from the slots in a first rotational position and are locked into the slots in a second rotational position, respectively. The upper and lower parts of the base can be separated from one another with a relative rotation between a first, locked position and a third, disengaged.

Abstract: A feeder comprising an elongate receptacle for food; a removable part; and an elongate restraining pin positioned within the feeder. The direction of elongation of the elongate restraining pin is parallel to that of the feeder. When in an engaged position, the elongate restraining pin is engaged with the removable part so as to couple the removable part to the feeder, and, in a retracted position, is disengaged with the removable part as to uncouple the removable part from the feeder.

Abstract: A feeder is disclosed comprising an elongate receptacle for food; a removable part; and an elongate retractable member positioned within the feeder whereby the direction of elongation of the retractable member is parallel to that of the feeder, wherein, in an engaged position, the retractable member is engaged with the removable part so as to couple the removable part to the feeder, and, in a retracted position, is disengaged with the removable part as to uncouple the removable part from the feeder.