A rare Siberian wapiti was seen in Viitasaari in Central Finland this week, Yle reported. The sighting stands out because it comes amid signs that new deer species could spread to Finland from Russia, Sweden and Norway.

The animal is one example of how wildlife ranges can shift across borders. According to Yle, the development is notable because it may gradually change the mix of deer species found in Finland.

For now, the confirmed fact is the Viitasaari observation. The broader question is how quickly other species from neighbouring countries may move into Finland in the years ahead.