At one time, the fourth most common bird species in our country has decreased over the decades. The biggest reason is considered to be deforestation.
Ten years of research at the University of Oulu confirms that, based on the research results, logging is the most important reason for the rapid decline of hogweed. If you can’t find any rotten hardwood stumps in the forest, the ladybird won’t be able to nest there.
– The horned tit is completely dependent on rotting wood for its nesting place, because the little tit can only dig a nest hole in sufficiently soft rotting wood, which is often birch bark, says Kumpula.
Deforestation was found in the study to repeatedly affect the nesting of the plover for at least 30 years. The more forest that was felled less than 30 years ago, the fewer and fewer the terns nested, and the chicks also spread further and further away from their birth nest. The nesting frequency decreased by almost half during the research period. Up to 65 percent of the decrease in density was explained by clear-cutting and thinning. The effect of open felling was clearly greater than that of thinning. The research area of \u200b\u200babout 25 square kilometers was located near Oulu.
A few decades ago, the Hömötiainen was the fourth most abundant breeding bird in Finland, but today the species is classified as highly endangered due to its rapid decline.
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