Any idea how to get a pigeon or dove out of my huge church with sky high ceilings?

[WalkerinSC]

1. Not sure if he is heavy enough

but something similar to a feral cat/small animal trap with a weight bearing trigger baited with food may do the trick. Depending on the size of your community, there are what are colloquially known as 'critter gitters' who specialize in safely and humanely trapping wildlife to be released later.