no claim is made regarding the process of manufacturing the present invention or the materials used . the elements that distinguish the present invention from prior art are what is claimed regardless of their material composition or fabrication method . referring to the present invention as depicted in the drawings : the base ( a ) is preferably a decorative wooden board substantially centered below the center of gravity of the perch system ( e )( f ). the base may also be a mass with a smaller perimeter but with enough weight to prevent the perch system from overturning . or the base can be a permanent foundation . regardless of what the base is , the base is that to which pivoting means ( b ) is affixed . pivoting means preferably is a ½ inch steel rod protruding from the base approximately 5½ inches with a smooth flat top upon which the weight of the perch system ( e )( f ) above bears . but there are many other ways , such as a thrust bearing , to implement the claimed pivoting means ( b ). the main branch ( e ) as depicted in the drawing is preferably a branch of dried wood extending approximately 5 feet and has a ½ inch hole in the lower end . the hole being shallower than the protruding length of the steel rod allows the main branch to rotate freely on the rod . it should be noted that the main branch need not be concentric with the axis of rotation ( d ). in fact , what is called the main branch may itself branch into separate trunks . whatever the geometry of the main branch , it is that component which is rotatably attached to the pivoting means . the axis of rotation ( d ) is chosen to be less than vertical so that the weight of a bird will cause the perch system ( e )( f ) to rotate . if the inclination of the axis of rotation ( d ) is too far from vertical , the geometry of the perch system is limited ; therefore 75 % to 95 % inclination is preferable . secondary branches ( f ) are fastened to the main branch such that the weight of all the branches including the main branch is substantially balanced about the axis of rotation ( d ). also , the branches ( e )( f ) are arranged such that when a bird is perched and gravity ( g ) causes the perch system to rotate , the bird will not be positioned above another branch but will be in a position directly above the waste containment surface ( h ). it should be noted that although it is preferable to make each instance of the present invention unique by assembling the perch system according to the random geometry found in natural wood materials and allowing for artistic expression , the perch system may be fabricated of predesigned components of any material . the waste containment surface ( h ) is preferably composed of a coated wire mesh screen bounded by an aluminum frame , which is then bent to the profile shown in fig5 a . the configuration of this bent surface directs waste material to the primary crease ( j ) and allows the waste to be hidden from view when the viewer stands far away , approximately 10 feet . also the sloping sides discourage a bird from traversing the surface and disturbing the waste material . a paper liner is preferably placed over the surface for convenient waste disposal and any means to fasten the liner in place ( k ) may or may not be provided ; both methods are claimed . no claim is made about the necessity for a lining material ; for example , the surface can be made of a durable solid surface that is easily rinsed clean . substantial compliance to the described cross sectional profile is what is claimed . the basic cross sectional profile shown in fig5 a may be improved as shown in fig5 b by creating slightly steeper slopes near the primary crease ( j ) so as to further discourage birds from traversing the surface and for improved appearance . however this alternative shape is in substantial compliance to the basic cross sectional profile as claimed . because a paper liner conforms better to a surface that is curved in only one direction , the cross sectional profile is applied in one direction for surface that requires a liner . but in case a solid surface is chosen and a liner is omitted , the cross sectional profile may be applied in various directions or swept around the perimeter to form the waste containment surface . any substantial application of the described cross sectional profile is what is claimed . fig4 shows the perch system as described in claim 2 . it varies from the perch system as described in claim 1 because it does not rotate on the base ( a ), rather it tilts slightly in all directions by means of flexure ( c ) which is preferably implemented with a medium duty steel compression spring . pivoting means ( b ) is preferably a ½ inch steel rod with a lower shoulder upon which the weight of the waste containment bears and is allowed to rotate freely . also , pivoting means ( b ) is preferably affixed to the means of flexure ( c ) below and affixed to the perch system ( e )( f ) above while allowing the waste containment to rotate freely . the pivoting means described in this claim may be situated anywhere along the lower extremity of the main branch ( e ). however or wherever the pivoting means is implemented , it establishes an axis of rotation ( d ) about which the weight of the perch system must be substantially balanced . in this case , the weight of a bird causes the perch system and axis of rotation ( d ) to tilt , the waste containment will rotate to a position directly below the bird thereby satisfying the smallest possible waste containment surface for a given perch system .
a decorative , functional perch system for pet birds , which maximizes climbing / perching areas for a bird while minimizing opportunities for said climbing / perching areas to accumulate droppings . said system also minimizes the visual profile of the waste containment means .