26 martie 2017

Eurasian blue tit

Eurasian blue tit (lt. Cyanistes caeruleus, ro. Pitigoi Albastru) is a small passerine bird in the tit family Paridae. The bird is easily recognisable by its blue and yellow plumage and its size.

It is usually 12 cm (4.7 in) long with a wingspan of 18 cm (7.1 in) for all genders, and weighs about 11 g (0.39 oz). A typical Eurasian blue tit has an azure blue crown and dark blue line passing through the eye, and encircling the white cheeks to the chin, giving the bird a very distinctive appearance. The forehead and a bar on the wing are white. The nape, wings and tail are blue and the back is yellowish green.

Blue tit seen in Herastrau Park, Bucharest

The underparts is mostly sulphur-yellow with a dark line down the abdomen — the yellowness is indicative of the number of yellowy-green caterpillars eaten, due to high levels of carotene pigments in the diet. The bill is black, the legs bluish grey, and the irides dark brown.

The sexes are similar, but under ultraviolet light, males have a brighter blue crown. Young blue tits are noticeably more yellow.


Blue Tit anti-predator behaviour

In the video bellow, A bird sounds the anti-predator alarm call (00:12) and the Blue Tit hesitates to take flight from the branch and petrified heads up to see wherefrom the predator comes.




Equipment Used:

- Canon EF 100-400mm f/4.5-5.6L IS II USM
- Canon Extender EF 1.4X III
- Canon 7D Mark II
- Sirui P-326 Carbon Monopod

Camera settings

- f/9.0, ISO 1600, 1/800s

IMPORTANT COPYRIGHT NOTICE: It's only fair to share... If you want to licence this video or any part of it please contact me! Any unauthorised use (including re-uploading on YouTube or broadcasting on similar services or TV!!!) of this copyrighted material is strictly prohibited.
Locația: Parcul Herăstrău, București, Romania

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