Menorca is a small island in the Mediterranean Sea belonging to Spain, with a population of approximately 88,000.
There is good data on the butterflies of Menorca[1][2][3][4] although it is not easy to find as most field guides do not give data on the smaller Mediterranean islands.
A good source in English is Butterflies of Menorca[5] which lists 26 species and gives data on flight period and abundance.
Butterflies can be seen in all months of the year but the best months are May to September; the only butterfly not to fly in this period is the green hairstreak which usually flies from February to April, but if the season is late it can be seen into May.
Swallowtails Whites Browns Monarchs Blues