Sounds familiar. The ones here, saw me put one of their brothers in the green bin. Now they alert me to when one died and where the body is. They are insistent, that they now be placed in the green bin. They follow me to the bin, saying their goodbyes, I say mine. When I close the lid they become silent. Then they beat me to the front of the house. Perching quietly now, they grieve.
More proof that death is not a real and necessary part of Nature. If it were, there would be no need for grief.