Thank you for the thorough evaluation of the data I provided, the problem with this data is it was independently gathered and I have to make sense of it, week 3 sees a significant spike of visits, I am not sure if this is down to an increase in food used, a cold snap in the weather forcing the birds to come into urban areas, the disappearance of a predator, I don't have adequate information, thankfully this is a hypothetical situation so I can perhaps find adequate answers.
weeks 1, 2 and 3 are very similar and week 3 being the significant difference. So yes the number of visits climbs into week 3, then levels to that similar to weeks 1 and 2 by week 4, this will be taken into account of the analysis.