Every time rereading the excellent wolf monograph by Mech and Boitani (2003), in particular, the item about wolf communication by Harrington and Asa, I was surprised to find out how rich voice-communication of wolves in North America and somewhere else can be. In my study areas in Belarus (look like in the whole country) I can characterize wolves as non-howling let’s say silent. More and more I become convinced that wolves in Belarus avoid to produce any loud noise.
This post gives the documentation by a camera-trap of two different litters (10 pups altogether), two breeding females of the same wolf pack, the founding male and two pup-sitters in Naliboki Forest. The last feature is particularly essential. One or two pup-sitters were present at pups on about 60% of the hundreds of photos taken. It looks like we have registered the features of another trend in the wolf denning behavior that we haven’t faced with before the lynx got common. That is when breeding wolves use pup-sitters to save their pups from the lynx aggression (see another post for other details), when they go for hunting.
In Belarus during many years of study on wolves during the early summer (May-June), when I was investigating denning in wolves, I noticed numerically that wolves roll in an engine oil on forest roads once and again. The same red foxes do, sometimes, lynxes do that. Later in July-September wolves almost stop this habit. Continue reading “Why do wolves roll in engine oil on forest roads during early summer?”
In Belarus lynxes quite often visit road pipes. In the warm season they mainly use road pipes without running water. In winter, when water is covered with ice, almost all pipes that are large enough are in lynx usage.
By investigating the denning behaviour and ecology of wolves (Sidorovich and Rotenko, 2018) and lynxes in Naliboki Forest, we faced with several evident trends during the last years (2016-2018) that we connect with the changes in the local vertebrate community or more specifically with the pronounced changes in the population densities of those species that may affect the denning conditions for wolves and lynxes.
Continue reading “Trends in the denning behaviour of the wolf and lynx in connection with the changes in the vertebrate community in Naliboki Forest (north-western Belarus)”
Wolves frequently use surprising things such as plastic or glass bottles, metal or plastic cans, rubber or leather boots, bones, antlers etc. They carry them, gnaw them, play with them, demonstrate them to another wolf etc. In my research practice on wolves I registered such a wolf behavior for many times, and gradually I started […]
Wolves frequently use surprising things such as plastic or glass bottles, metal or plastic cans, rubber or leather boots, bones, antlers etc. They carry them, gnaw them, play with them, demonstrate them to another wolf etc. In my research practice on wolves I registered such a wolf behavior for many times, and gradually I started realizing, why wolves deal with the mentioned seemingly strange things. I might be not entirely right in the ideas, but anyway would like to share them as well as the photos taken.
Population decline of carnivore species may happen suddenly, develop rather fast and proceed short-term. For instance, such demise character was known for the European mink in Belarus and Russia (Macdonald et al., 2002; Sidorovich, 2011). Population decline of other carnivore species may pass gradually and less evident, and a considerable decrease in population density may take many more years.
The situation that is characterized by gradual and long-term decline is fairly hard to notice, while manipulating short-term data only. It takes much time to establish a right hypothesis on the decline and to prove the hypothesis. Usually, in such a case, when a population decline appeared to be evident, it is already too late to get a complete dataset to analyze the declining process and to reveal the factors that impacted the population. The polecat Mustela putorius population decline in Belarus was characterized by the mentioned features of gradual and long-term decline (see Sidorovich, 2011). Our results of the study on the polecat demise suggest the following negative factors that are responsible for the population decline.