For evoking the sheer joy of nature, anything written by Seton Gordon (1886-1977). Some of these books are now hugely expensive collectors' items...
He was an amazing character. having walked over the entire Highlands of Scotland, he took on and ran the task of organising coastwatchers in the remote north-west during WW1 to find any lurking U-boats. In WW2, he helped set up a similar organisation.
He was also much in demand as a judge of piping competitions. His amazing ability to interpret a piper's grace notes he attributed to the 'ear' he had developed from a young age in identifying birds by their calls and songs.
MJB