These bird feeders mount on your window using suction cups. Draw the birds of your choice with the variety of platform, suet or nectar bird feeders.  The nectar bar is small enough to use on the window of your RV when your are visiting Portal or other birding hot spots.  If your nectar eaters leave you for the winter, use your feeder year round by simply removing the top and filling the feeder with seed.  To properly mount your feeder be sure the glass is clean and then soak the suction cups in hot water until they are pliable. These feeders will stay put!  Yet, they’re simple to remove!