38 connected to threaded connection 46 of handgrip 40 fig8 shows bird feeder unit 1 d with all available modular components in use upper feed tray 10 being connected at threaded connection 18 to lower feed tray 20 at its connection 24 the lower feed tray being connected at its threaded connection 26 to squirrel guard 30 at its connection 36 and the squirrel guard in turn connected at its connection 38 to handgrip 40 at its connection 46 adding components to the assembled bird feeder unit increases the length of the overall unit this added length of the bird feeder unit on pole 50 is accommodated by adjusting the position of locking pin 54 through the pole when configured as in fig6 bird feeder unit 1 b is maintained in position on pole 50 by locking pin 54 through hole 64 and its corresponding opposite hole 65 when configured as in fig7 bird feeder unit 1 c is maintained in position on pole 50 by locking pin 54 through hole 66 and its corresponding opposite hole and when configured as in fig8 bird feeder unit 1 d is maintained in position on pole 50 by locking pin 54 through hole 68 and its corresponding opposite hole of.