The RSPB is a charity protecting birds and wildlife. They tackle the problems that threaten our environment. You can join as a member and donate a regular monthly amount to help with their activities.
For every £1 of your membership fee, the RSPB channel 90p into current and future conservation projects, so you can be confident that your money is having a real impact. If you're thinking of joining, check here just in case there's any RSPB voucher codes, it's unlikely but you might find an interesting deal instead!