The founders of Mariposa have been pioneering butterfly tours in Spain’s magnificent Montes Universales for years, and this particular tour is always a highlight of our summer - the region has no history of intensive agriculture, so it feels a little like stepping back in time to a period elsewhere in Europe when butterflies were much more numerous than they are today. The sheer numbers of butterflies, among them some particularly scarce and rare species, needs to be seen to be believed.
In 2026, this perenially popular tour will be even more special than usual. Our visit is timed perfectly to coincide with the rare occurrence of a total solar eclipse in Europe. Our base, in the atmospheric and achingly beautiful medieval mountain town of Albarracín, lies directly in the path of totality. Building upon the firm friendships we have built with the local townspeople over the years, we will ensure our guests enjoy the eclipse from a unique, elevated vantage point away from any crowds, all the better to enjoy this once-in-a-lifetime celestial event. To say we're excited to witness this, and to share it with our Mariposa guests, is an understatement!
Our visit is also timed to coincide with the peak emergence of one of our favourite European butterflies – the strikingly attractive Spanish endemic Zapater’s Ringlet Erebia zapateri. That’s just one butterfly highlight of many this tour provides. Lycaenidae (blues, coppers and hairstreaks) will be a particular feature of every day, and we’ll encounter thousands of individuals of blues in particular – including vibrant Azure Chalkhill Blue Polyommatus caelestissimus, snowy Spanish Chalkhill Blue Polyommatus albicans, subtle Oberthür’s Anomalous Polyommatus fabressei and Ripart’s Anomalous Blue Polyommatus ripartii, as well as the rare Mother-of-Pearl Blue Polyommatus nivescens. We will see Southern Brown Aricia cramera, Spanish Aricia morronensis, and Mountain Argus Aricia montensis, encounter freshly-emerged Iberian Sooty Copper Lycaena bleusei, and search for Spanish Purple Hairstreaks Laeosopis roboris at the margins of damp meadows.
The countryside in the Montes Universales is a mixture of pine and deciduous forest, arid scrub, and small patches of arable fields, laid over a landscape that’s corrugated with hills and sheltered valleys, and threaded by small rivers and dry barrancas, or gorges. For such a relatively compact area – approximately 1,000 square kilometres – it packs in a variety of habitats and supports a high density of both butterfly species and sheer numbers of individuals of them.
The numbers of some species can beggar belief. We’ve enjoyed days here in the past when Great Banded Graylings Brintesia circe and Iberian Marbled Whites Melanargia lachensis take to the air with every step one takes through dry grassland. Satyrids are another prominent feature of the tour, and we anticipate a host of graylings including Striped Hipparchia fidia, Rock Hipparchia hermione, Tree Hipparchia statilinus, and False Arethusana arethusa. Amongst their numbers we’ll look for their rarer counterparts – enigmatic Southern Hermit Chazara prieuri and Hermit Chazara briseis. Esper’s Marbled White Melanargia russiae is always a sought-after prize for the keen-eyed, Black Satyrs Satyrus actaea will reward a stealthy approach, and the distinctive iphioides subspecies of Chestnut Heath Coenonympha glycerion will be numerous as we enjoy gentle-paced walks in grassy places.
The countryside here, for all its nominally montane range of altitude from 1,000 to 1,900 metres, makes for easy-going and relaxed butterfly-watching. It’s never steep or challenging underfoot, and with sunny days almost guaranteed at this time of year, it’s always a joy to spend time out and about in this region. The mornings are pleasant and we ensure that we spend the heat of the day in steep-sided canyons or at higher altitude, with plenty of iced water for our guests, and to temper our daily itinerary to maximise comfortable and productive time in the field. Many of our daily excursions are just a few kilometres from our hotel, and the roads we travel are of excellent quality, and quiet.
Our base for the week is in a charming family-run hotel within the imposing walls of the medieval town of Albarracín – this small town alone is worth visiting the Montes Universales to see, and is quite simply magnificent, boasting winding, narrow cobbled streets through ancient timbered buildings, castles, and an imposing cathedral. Small wonder the entire town is officially a Spanish National Monument – but, incredibly, it is never busy or thronged with tourists. We regularly see Cleopatra Gonepteryx cleopatra and Iberian Scarce Swallowtail Iphiclides feisthamelii in the carpark, and the odd Geranium Bronze Cacyreus marshalli has been known to pop up on ornamental displays of pelargonium. The townsfolk are friendly and welcoming, and it feels like coming home whenever we return here.
In summary, if you wish to stay for a week in an historic town voted many times ‘prettiest in Spain’, in an area where 95% of the butterflies can be found in 10% of the landscape thus leading to extraordinary numbers at the best sites, and with a total solar eclipse as the cherry on the cake, then this is the right tour for you.
