A website to display results from a county-wide mammal, amphibian and reptile distribution atlas project organised by theĀ Hertfordshire Natural History Society, starting in 2015. Based on a similar project for the bird distribution, it presents "dot" maps for each species, lists of species for each 2km x 2km (tetrad) survey unit and supporting resources.

Hertfordshire hedgerow © C W Dee
Data tabulation © C W Dee