Western Green Lizard (Lacerta bilineata) - male
There are three species of 'Green Lizard' in Europe - Lacerta bilineata, Lacerta viridis and Lacerta trilineata. The males of viridis often develop blue heads in the breeding season, those of trilineata males tend to stay green/yellow, and bilineata are somewhere in the middle, like this one, with a suffusion of blue along with a yellow throat. UK population, June 9th 2019
Western Green Lizard (Lacerta bilineata) - male
There are three species of 'Green Lizard' in Europe - Lacerta bilineata, Lacerta viridis and Lacerta trilineata. The males of viridis often develop blue heads in the breeding season, those of trilineata males tend to stay green/yellow, and bilineata are somewhere in the middle, like this one, with a suffusion of blue along with a yellow throat. UK population, June 9th 2019