This website is not used for monitoring 'Pollard walk' butterfly transects. These are co-ordinated through the official scheme in Germany - https://www.ufz.de/tagfalter-monitoring/
There are other methodologies to count butterflies, like the 15-min Counts collected through the ButterflyCount mobile application, where your GPS tracks your route while counting butterflies for 15 minutes. All the data collected on this website will be shared with the German BMS and a Citizen Science project VielFalterGarten.
This free resource makes it easy to keep track of what you see while making your data openly available for scientific research, education, and conservation. The app is translated into German:
To see more information on the ButterflyCount app check the page: https://butterfly-monitoring.net/ebms-app