In many nesting boxes, the tits are currently very busy building a nice cosy little nest!
Have you noticed an accumulation of material to the back of the nesting box? If so, do not forget to mention it on the observation record form on the web site! This form can be accessed using your log-in and password. To find out what to do, view the following video tutorial.
If you want to find out more on how tits build their nests, then re-read this short article published last year on the site: http://xperibird.be/fr/actualites/8/129/construction-du-nid-c-est-parti