You do come out with some wonderful nature recordings! I second Klankbeeld's comment about flac compression. I have gone over to that for all my own sound files, and convert all downloaded ones to that format.
Just what I need as part of night ambience for a 30second film as part of the V48Hr film competition. Attribution would of course be made to you in the credits. As all films entered have to have complete worldwide distribution commercial clearance, may I contact you by email to check if you are happy about this use? Thanks. Jenny, firstname.lastname@example.org