A lovely shot, but just in case anyone is thinking of trying something similar in the UK,
all UK bat species (and their roosts) are strictly protected by law, so you would need to obtain an appropriate licence to use artificial light (such as a flash or torch) to photograph a wild bat in the UK, or to otherwise disturb a bat or its roost. Breeches of the law can result in criminal prosecution, an unlimited fine, confiscation of any equipment used in an illegal act, and up to 6 months prison sentence
per offence (which could be each photograph taken!). A different licensing authority exists for England, Scotland, Wales and Northern Ireland; so, for example, an English licence would not cover any photography in Wales. Thought I'd better mention this to keep people out of trouble.
