Below you will find Free Wildlife Identification Guides and Keys for many different species and organisms. From trees to lichen and butterflies to birds you should be able to identify the majority of native (and some non-native) species that you are likely to come across.
For an easy way to identifying British Bats by the sound of their echolocation calls through a bat detector, use the online British Bat Echolocation Key.
The latest way to identify wildlife is to use mobile apps and crowdsource, with ecology experts and a wider community. To get expert and community help with identifying wildlife, you can use Seek, iNaturalist and iSpot to do this.