It sounds to me like something is coming to a close within your life. It could even mean suffering or even 3d perception is leaving your life, it’s hard to say personally because I am not you. This is your subconscious afterall. In general it sounds like a closing. an ending of some sort. and the birds are the messenger telling you this.
We’re having more vivid dreams once we awaken because the veil is much thinner, the veil is here. It’s much much easier to tap into the various dimensional planes as all is connected and the barriers are down. Everything is starting to intersect and intertwine conjoining into one. So even our dreams are starting to transform around us. They are becoming more clear, messages, precognition, lucidity and even full on OBEs are all becoming a lot more apparent during these shifts. All we see or seem is but a dream within a dream.
hope this helps <3