mice and rats
No, owl decoys are not effective in deterring snakes. Snakes do not perceive decoys as threats, and their natural predators are usually mammals or birds. To deter snakes, it is best to use physical barriers or professional snake repellents.
To keep an owl away from your property, you can install motion-activated lights, use scare devices like shiny objects or noise makers, and trim trees to remove perching spots. It's important to avoid harming the owl, as they are protected by law in many places.
Check the local hardware store for a plastic owl. This will keep birds away. No poison too.
Carl-Georg Schilling has written: 'Le grand duc: a method of taking birds of prey with the aid of a trained eagle owl' -- subject(s): Cormorants, Decoys (Hunting), Eagle owl, Fowling
You should put a chicken wire mesh fencing above where you have the chickens. An owl cannot swoop down and grab the chickens through the wire mesh.
To deter crows from eating stones from a grave, consider using physical barriers such as mesh or netting over the grave area. You can also place reflective objects like old CDs or aluminum foil to scare them away. Additionally, using decoys, such as a plastic owl, can help keep crows at bay. Regular monitoring and adjusting your methods may be necessary for effectiveness.
No Owl can here from this distance
This happens a lot with owls. If a flock of birds thinks the owl is disturbing them or especially if there is a nest nearby the flock/mother&father will chase the owl screaming and attacking it, just to keep it away from the nest. In this case there were probably multiple nests and all the birds decided to chase him away from there.
I know you can buy fake birds of prey from hardware or farm supply shops that will keep all sorts of birds away...at least that is the theory and it can be successful. There are companies that professionally do this sort of work with live birds, but it wouldn't be a cheap option. Apparently it is done at Windsor Castle to deal with the pigeon problem there. Most places that sell gargen supplies, sell a plastic owl. Place this near anyplace where you have bird problems and they are too busy trying to chase away the owl, they ignore your garden.
eat them
One can purchase Owl Gifts online from the English Owl Company. They offer unique owl gifts. Anything and everything is owl. They offer a lot of great owl ideas and gorgeous owl themed products.
And how would they do so? Do you need to keep the owl in your pocket?