I understand the attraction of the berries from the bush in the back of my yard, but I have a feeling that you haven't been noticing your ranks diminishing. I have. I believe I have found the cause. See my tiny grey cat, despite bell that we attached to her collar to avoid this very trait, has been picking you off one by one and bringing you to our patio for lunch. This does not speak well to your intelligence or agility.... (or perhaps it speaks to the agility of my cat, but either way,) I thought that a missive to let you know what was happening was in order.
Six of your buddies have become a meal for the cat in the lst 4 days. And every time one of your buddies disappears I hope and pray that you will not come back, at least for a while. But each evening I hear you, frolicking around the bush. With furry death beneath enjoying the dinner time show.
Although the pull of the berries is strong, please, wise up, and get out of my yard... before your entire family becomes a meal for my precocious feline.
(Picture is not mine, link is here.)