Injured wood pigeons

Hi

i have had 3 injured wood pigeons in the garden over the past three days. We were able to move the first into a box and give it shelter food and water. However, what I’m assuming was it’s ‘mate’ was later found search for it. It the became apparent this was also injured.

Both of them died that night. I have now come home to another one injured or sick.

I cannot get through on a help line and don’t know what to do? Can anyone help?

thanks