Wild Pigeon Droppings

I inherited 2 acres in the county last year. Included were 8 grain bins-several without caps. These were full of pigeons nesting on the floor in 3-4 inches of droppings. We cleaned a few out for storage and I left a few uncapped for the birds. When is it safe to incorporate this pile (setting since last summer) into my garden and around my fruit trees/bushes? Can I till in a bucket full when I plant strawberry crowns next week, or will it burn/rot them? I am planning on creating a better space for these birds within their current system. I will include a picture of the manure pile and the birds current life style.