You can help rescue a tired or bedraggled bee very easily. Either place it onto a nectar rich flower or administer bee rescue.
Look out for winter active bumblebees in your garden and report your findings to BWARS
Male bees are the lager louts of bee worldd, hanging around in nectar bars waiting for the girls
There are a fair few rare bee species, with some literally on the brink of extinction, but few more so than the Shrill Carder Bee (Bombus sylvarum).