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During the nestling period, both female nest attendance and male feeding rate are higher in the morning, declining throughout the day. [20] Although socially monogamous, blue tits regularly engage in extra-pair copulations with other individuals. [21] Eggs are 14–18 mm (0.55–0.71 in) long and 10.7–13.5 mm (0.42–0.53 in) wide.
It is commonly known as the fairy penguin, little blue penguin, or blue penguin, owing to its slate-blue plumage and is also known by its Māori name kororā. It is a marine neritic species that dives for food throughout the day and returns to burrows on the shore at dusk, making it the only nocturnal penguin species on land.
Construction of the nest is done primarily by the female and takes around 10 days to complete. These nests are small, cup-like structures lined with grass, feathers, stems, and hairs. Each female lays three to seven light-blue or, rarely, white eggs. The female incubates the eggs, which hatch after 13 to 16 days.
The blue-footed booby lays one to three eggs in one nest at a time, although 80% of nests only contain two eggs. [28] Eggs are laid five days apart. After the first egg is laid, it is immediately incubated, which results in a difference in chick hatching times.
Eurasian oystercatcher eggs camouflaged in the nest. Many animals feed on eggs. For example, the principal predators of the black oystercatcher's eggs include raccoons, skunks, mink, river and sea otters, gulls, crows and foxes. The stoat (Mustela erminea) and long-tailed weasel (Neogale frenata) steal ducks' eggs.
It builds a cup nest in a tree and lays 2-3 unspotted pale blue eggs. The eggs hatch in 11–12 days, and fledging occurs in another 12–13 days. The peak breeding season is September to December. The Cape white-eye feeds mainly on insects, but also soft fleshy flowers, nectar, fruit and small grains. It readily comes to bird feeders.
That’s a state record for nest size and well above the 50-to-100-egg average for the species. Average for pythons is 50 to 100 eggs, experts say. This nest was 111 eggs.
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.