How to read the histogram?

By default, the graph is displayed by week. The yellow bars show the catches reported through citizen traps. The purple curve shows the moving average of catches: it smooths short-term fluctuations to make the overall trend easier to read. The black curve shows confirmed or neutralised nests. The orange curve shows the mean air temperature at 2 m above ground for the selected weather point. In weekly view, it corresponds to the average of the available daily mean temperatures for that week.

Moving average: in weekly view, each point corresponds to the average of the last three available weeks. In daily view, each point corresponds to the average of the last seven available days. This curve does not replace raw catches: it helps distinguish a real biological trend from a short-term peak caused by weather, bait renewal, the number of active traps or delayed data entry.

• The displayed temperature is not a maximum temperature, not a feels-like temperature and not a true spatial average for the whole region.
• The horizontal temperature lines are indicative biological reference points: they help identify periods when queens and colonies may become more active.
• An increase in catches may also reflect more active traps or more records, not only a real increase in population.
• Catches and nests must not be added together: they describe two different types of information.