The wind in the first part of the dream feels like a storm related to climate change. The umbrella and circus tent represent those things that cannot withstand these changes. Circuses represent things unreal and freaky. I often look at the state of the world and it feels that way to me---unreal and freaky. Despostism and wars abound everywhere. Countries being run by circus clowns while the global climate may be the end to it all.
So, to answer one part of your question, circus images in dreams are not fun for me.
As for the birds, it's interesting I would see crows. Crows are usually depicted in horror fiction as a symbol of a bad omen. Yet, I didn't get that impression from them this time. It's like they were "above it all." Man, don't I wish that could be me sometimes!
Their feathers could be related to a biology assignment my student was working on. The topic was birds and we discussed the different types of feathers---contour and down.