(11) Korentosilta Bridge
Korentosilta, in English "Dragonfly Bridge," is a fine spot for observing dragonflies flying above the reed bed, which is their natural habitat. Mayflies (Epehmerooptera), damselflies (Calopterygoides), and first dragonflies (Odonata) start appearing in early summer. On a good day, dozens of damselflies can be seen on the river around the stalks of grass and shore canes. When the sunshine hits them, the wings and bodies of the damselflies glitter in the lovely colors of different metals. The body of the banded demoiselle (Calopteryx splendens) shines green or blue like emerald or turquoise.
The banded demoiselle (Calopteryx splendens)
Hukankorento (Libullae) are a prominent group of dragon flies, which start to fly out in the early summer. Dragonflies are sometimes called the hawks of insects. You can see them on the forest paths or openings, where they fly, actively hunting other insects. Also you might glimpse them sitting a little higher than their hunting area, for instance on a tree twig or on a stalk of a grass.
The Four-spotted Chaser (Libellula quardimaculata)
The Broad-bodied Chaser (Libellula depressa)
Butterflies (Papillionidea) are the real beauties of the insect world. The first butterflies appear along the trail already in April on a warm sunny day. Often the earliest butterfly of the year is the bright yellow brimstone (Gonypteris rhamni) or the well-known small tortoiseshell (Aglais urticae). Also the peacock butterfly (Nymphalis io) and the mourning cloak (Nymphalis antiopa), also known by the name Camberwell Beauty, can be seen in the spring. All early butterflies hibernated through the winter. They started flying the previous autumn.
A peacock butterfly after hibernating; notice how worn its colors are
As the spring continues, the first new butterflies of the year eclose, or hatch. Then you often can see blues (Polyommatinae), green-veined whites (Pieris napi), and wood whites (Leptidea sinapis) along the path. The big and conspicuous Tau emperor (Aglia tau) also begins its flight. This copper-colored moth with a spike-like figure on the wing is a fine sight. The lively male flies about in forest openings in the daytime looking for a female mate.
The number of species grows bigger as the spring turns into summer. On the geranium flower you can spot a beautiful orange tip (Anthocharis cardamines) or a small-sized northern checkered skipper (Carterocephalus silvicola). Many fritillaries (Heliconiinae) and more blues start to appear.
True to its Finnish name “Aurora,” the orange tip bears the orange colors of the sunrise.
In the beginning of the summer and also later in June, around the Juhannus festival you can spot along the trail two of the greatest beauties of Finnish butterflies, swallowtail (Papilio machaon) and poplar admiral (Limenitis populi).
The swallowtail (in Finnish “Ritariperhonen,” knight butterfly) has “spurs” on its wings.
The poplar admiral is one of the most gorgeous butterflies in Finland.
In midsummer the numbers of different species and individual butterflies is at its greatest. You can see many different large fritillaries, blues and coppers, ringlets (Aphantopus hyperantus), and Essex skippers (Thymelicus lineola). Even later, as the autumn draws near, you can see butterflies of different species. You can easily find a brimstone, a peacock butterfly, a small tortoise shell or even a rare brown hairstreak (Thecla betulae) and migrating butterflies like the painted lady (Vanessa cardui) and the red admiral (Vanessa atalanta).