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Do the pigmented spots on the egg make the shell stronger?

Submitted by Looduskalender EN on Fri, 13.05.2016 - 10:11

Text and photos  Marko Mägimarko.magi@ut.ee

Translation Liis

Great tit eggs  

Most tits have already finished their egg-laying. The females sit in the nests, adjust the eggs every now and then and wait for the chicks to hatch. There is not long time left until the first tit chicks appear. On observing the incubation in the nest camera it is possible to see how active a process it is – it is not just sitting in one place but an active ”trampling” procedure which the egg shells bravely have to withstand..

Brood patch – what is it?

Submitted by Looduskalender EN on Fri, 13.05.2016 - 10:01

Text  Margus Ots, coordinator of Great Tit Year

Translation Liis

Looking at an incubating great tit in the webcam the question might come up – how can it incubate the eggs through the fluffy plumage? Feathers have a very poor heat transmission capacity after all. To make the body heat reach to the eggs the feathers of the female great tit on the abdomen drop off, and a skin area without plumage is created – the brood patch.  So during the brooding period the eggs come into contact with the skin of the abdomen  that is rich in blood vessels and the heat  needed for the development of the chicks reaches the eggs.

VIDEO: Forest camera starts soon!

Submitted by Looduskalender EN on Thu, 05.05.2016 - 09:56

Video and trail camera records Ahto Täpsi

Translation Liis

 

 

Brown bear   Pruunkaru       Ursus arctos

 

At Alutaguse some of the installations have to be replaced but within short we will probably have the camera in working order. The interesting periods of bear life begin in May, but more details about that when the webcam has started working.

Pruunkaru      

Spring has arrived!

Submitted by Looduskalender EN on Wed, 04.05.2016 - 18:36

Photos Arne Ader

Translation Liis

Vaher õitseb

Maple flowering

 

Maple; Norway maple    Harilik vaher        Acer platanoides

 

The flowering start of maples marks the beginning of proper phenological spring.

A maple in full flower – it is a real sight. On warm and sunny spring days we hear the buzz of bees and other insects from the trees who, oblivious of themselves, gather nectar as well as the greenish pollen necessary for the activities of the organism.

 

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