krauklis

Raven - "wolf-bird"

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Inuit call raven a „wolf-bird”, as it cooperates with wolves – react on their howling, show them location of possible pray while wolves follow raven’s voice. Winter is the time of surviving, when animals have to get used to deep snow, frost and short days. Raven too has to be satieted to survive cold nights; it needs at least 200g meat a day. However, raven is large bird weighting approximately 1 kg so it can go without food for 3 days. Ravens find food flying across forests and checking every part of their territory. In Latvia, territory of one raven couple is about 15km2. When something has been found they have to show it to other predators to get something to eat as they can’t tear large mammal skin. That kind of cooperation is beneficial for both – ravens and predators.

Relations between ravens

Relations in raven society helps survive even the weakest and youngest birds. Ravens do not have their own territory until they are 4-6 years old. Young birds live together in flocks where their number always is changing. When they are ready they form pairs and leave the flock, however, they still do not “own” land so they roam widely looking for food.

If big animal has fallen in the territory of adult raven couple they don’t fight other ravens, however, if there is new couple in their territory, old ones put them in their places. The dominant couple show off their rights and bellicosity. Old ravens raise their “eyebrows” and slick down or fluff up their feathers. Female ravens are more aggressive against other female ravens while male ravens are more aggressive against other male ravens. In this film you will see that other birds too get excited so they come together time to time and clamour a bit to calm down.

In this movie you will see that ravens do not chase magpies, because there is enough food. However, magpies are careful and tries not to get caught. httpv://www.youtube.com/watch?v=qY05C2xFHAI

White tailed eagle finds food

White-tailed eagle by watching ravens behavior may determine the location of the food. This is a third winter’s eagle. It shall investigate and verify security of the location. Jay uses absence of the eagle and lands on the carrion. It does not let opportunities pass to feast on the fallen animal. The eagle returns. It is very attentive when arriving at carrion the first time. The eagle can eat much meat at once, so eat less frequently than small birds and afford scouting for longer period of time.

Scout Ravens

ravenAnimal carcasses are usually found by the local raven couple. They often hide their food even several hundred meters away from the bait. This is the feed stock for a rainy day. A Great Tit is nearby. It is interesting that this came to separate from other tit flock, which would be safer to be in. Apparently the weather forces them to change their habits. A tit can lose 10% of its weight over one cold night. However, this tit is fed, so it will not freeze.

Izlūki kraukļi

Kritušo dzīvnieku pirmie parasti atrod vietējais kraukļu pāris. Kraukļi barību bieži vien slēpj pat vairākus simtus metru attālumā no ēsmas. Tas ir barības krājums nebaltām dienām. Apkārt lēkā lielā zīlīte. Interesanti ir tas, ka šī turas atsevišķi no zīlīšu bara, kurā uzturēties būtu drošāk. Acīmredzot laika apstākļi spiež mainīt ieradumus. Zīlīte vienas aukstas nakts laikā var zaudēt 10% no svara. Taču šī zīlīte ir paēdusi, tāpēc nonosals.

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