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Do birds mind our presence?

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  Summer is the time when we tend to spend more time outside, reconnecting with nature one way or another. If we are keen observers, birds offer us myriad opportunities to engulf ourselves in their world of relationships, either with their mates of the same species or with birds of different species. But what about their relationship with us: do they mind our presence? Birds have long been perceived as not the brightest of the lot. The popular saying of having a “bird brain” has not exactly been a praise. At least until recently. As it turns out, many birds are among the smartest animals. That’s probably not surprising to anyone who observed the birds from the craw family for more than five minutes. But from a scientific point of view, the misconception lies in the different structure of brains. Birds don’t have the same structure of brain as mammals, thus it was considered that they are not capable of innovative ideas or self-consciousness. As many birds showed the capability to ...

The blue days of moor frog

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A pleasant warmth awakens the moor frog ( Rana arvalis ) from hibernation.   The coming spring is luring him out of his winter shelter. He spent the winter hidden in a deep rock crevice, which offered him (overwinter) protection from cold.   But this year the shelter was not enough to protect him from freezing. The moor frog (photo: Goran Ĺ afarek). Fortunately for the moor frog, freezing isn’t a serious issue. Though the ice crystals forming in the body can harm cells and organs of most animals, frogs and toads are protected by high concentrations of glucose which prevents the damaging freezing of the tissue.   And so, even though his heart stopped beating for a while, at the end of February the moor frog awakes alive and kicking . The male immediately springs into action. His rivals for the females have already started their concert in the nearby pond and there is no time to waste. Their eager singing guides him to the breeding area, which he's been visiting s...