- Records extracted from Facebook and other media such as Flickr have been used. The reason for this choice is that it is one block of data that I know has been assembled consistently. Also, it is the only block of data that I have ready access to (other data go on the HRS database that Stuart manages).
- I created a baseline by generating a set of tables for each species in the years 2013 to 2017 inclusive and then used these data to create an average for each week for each species. This is the background data used for comparative analysis and shows up as a blue line on the charts.
- I then overlaid weekly data for each species up to the end of week 30 in 2018; i.e. up to Saturday 28th July.
|Figure 1. Episyrphus balteatus|
|Figure 2. Eupeodes corollae|
|Figure 3. Eupeodes latifasciatus|
|Figure 4. Eristalis pertinax|
|Figure 5. Eristalis tenax|
|Figure 6. Rhingia campestris|
|Figure 7. Volucella inanis|
|Figure 8. Vlucella pellucens|
|Figure 9. Volucella zonaria|