I have amassed decades long data on bird populations and need help in calculating their population trends. There is a great bulk of research published worldwide where a variety of statistical packages (e.g TrendSpotter, rTrim here) were used to index population trends, however, I found none that would do this job using Python. While I have a profficient Python developer, the latter is having hard time deciding on the choice of appropriate statistical methods that could be used to analyse data. Anyone can help?