Patent ID: 7093561

Claim:
A bird feeder comprising: a bird feed containment housing having a housing wall defining a housing interior and having at least one housing opening to receive a convertible feed port assembly; a convertible feed port assembly including, a feed port having a port plate with a port opening therethrough aligned with said housing opening to enable access to bird feed within the housing and engageable with the exterior of said housing wall, and a support frame connected with said port plate and extending through the housing opening into the housing interior, said support frame including a track oriented substantially transverse to said port plate for receiving and supporting a door; and a movable door having a feed aperture therethrough, said door engaged within said track so as convert said bird feeder between an open door position in which said port opening of said port plate is opened by moving said door to a retracted position within said housing interior such that bird feed within the housing is accessible through said port opening, and a closed door position in which said port opening is closed and bird feed within the housing is accessible only through said feed aperture of said door, said door remaining engaged with said track in both said open and closed positions and while moving therebetween.