I live in central Mexico in an acre garden that contains a lot of vegetation. I have multiple feeders but the Beryllines control all the feeders and keep the other 4 varieties of hummers that I normally have out of the garden. I have tried keeping the feeders in close proximity. I have also tried keeping them at large distances and put the feeders so that the hummers can not see the other feeders, ALL with no luck. If anyone has any suggestions I would really appreciate it.