Science is a language for talking not about experience but about the world. You should be able to differentiate the description of birds at your feeder from your explanation of your observations.
Many experts feel that several bird species are in decline.
Other species are spreading their range. It is always useful to compare results obtained from several approaches before drawing conclusions. The discussion area would be an excellent place to share the new understandings you have developed. You can also talk with others working on the project.