cylindraceum). Typical birds in these areas include Eurasian woodcock (Scolopax rusticola), the common blackbird (Turdus merula azorensis), western Azores goldcrest (Regulus regulus inermis) and Madeiran chaffinch (Fringilla coelebes moreletti). The trail ends (at P11) alongside a debris field caused by landslide following the 1998 earthquake. PRC4FAI Caldeira, refers to the perimeter of the Caldera, approximately , is the beginning of a medium-difficulty trail, that encompasses the rim of the stratovolcano. This circular route around the crater rim begins and ends at the entrance to the tunnel leading to the scenic overlook. Located in the centre of the island of Faial, the Caldera has a diameter of and depth, covered in an exuberant mixture of vegetation, such as Laurissilva. The formation of the caldera resulted from a long process that was initiated 550 million years, with the last geological event occurring 1200 years ago. PR6FAI 10 Vulcões, considered the longest trail in the Azores, this trail extends , and connects three existing trail segments: the Caldera, Levadas and the Capelo-Capelinhos. Normally the trail begins from the caldera and extends through the ten principal volcanoes existing along the fissural alignment of Capelo. The biodiversity and geodiversity is a constant along the trail, and terminates at the Lighthouse of Capelinhos (the site of the Interpretative Centre of the Volcano of Capelinhos). Approximately a change in altitude, this difference allows a variety of endemic species that includes ravines and canopies, in addition to different birds. The Cabeço dos Trinta, the western extension of volcanic craters on the flanks of the caldera, is a basaltic cone. In addition to the trail the circles the cone, a tunnel permits access to the centre of the geological structure, which is covered in natural vegetation, such as heather (Erica azorica), holly (Ilex azorica), festuca tuff grasses (Festuca jubata), Daboecia (Daboecia azorica), Polypodium ferns (Polypodium azoricum), Tolpis azorica and Rubia agostinhoi. Throughout the year there are also guided tours and trail circuit organized by the Nature Park commission, such as the Caminho do Baleeiros, a circuit dedicated to the whalers who lived in Capelo, before the volcanic eruption. Fauna Many of the islands bird species are found within this zone, including many species endemic to the Azores, such as Azores chaffinch (Fringilla coelebs moreletti), the western Azores goldcrest (Regulus regulus azoricus), and the saffron finch (Serinus canaria), in addition to the local common buzzard (Buteo buteo rothschildi). The caldera