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The female usually places small pebbles around the entrance of the nest. The 3 or 4 pale blue eggs with fine red-brown speckles are laid at daily intervals. [11] [12] They measure 19.6 mm × 14.7 mm (0.77 in × 0.58 in) and weigh 2.26 g (0.080 oz). [11] They are incubated by the female and hatch after 13–14 days.
The eggs are initially blue, eventually turning speckled and brown, which allows them to blend in with the stony background. About two days before hatching this colouration is lost and the brown head of the larvae becomes visible. The hatching process takes around 12 days, or longer if the eggs are at higher altitudes.
The eggs are a lighter colour than those of other corvids, [69] being smooth, a glossy pale blue or blue-green with darker speckles ranging from dark brown to olive or grey-violet. [70]
Between two and six eggs are laid during breeding season. The eggs are oval in shape with a somewhat glossy surface. The background colour of the egg shell tends to be pale variations of greenish-blue with brown- or olive-coloured speckles.
Two eggs are laid, which can be white with red or brown spots or blue with dark brown speckles. [2] Habitat and conservation status It is ...
The colour of the eggs seems to have evolved through the relatively good visibility of blue at low light levels. [50] The egg size is 26.5–34.5 mm (1.04–1.36 in) in length and 20.0–22.5 mm (0.79–0.89 in) in maximum diameter. [15] Eggs, Collection Museum Wiesbaden, Germany
The types of eggs you will find in your grocery store or local farmers' market can make mile-high meringue pies and hearty egg salad sandwiches. And they have one major thing in common besides ...
The report also accounts the clutch contained two eggs, which is typical of this group. The eggs were pale blue, with a few light brown speckles. The eggs weighed between 8.5g and 13.5g, and measured 27.6 - 28.1mm by 31.5 - 32.4mm. [3] As for distribution of the roles, both sexes participated in incubation.