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Osprey. The osprey (/ ˈɒspri, - preɪ /; [2] Pandion haliaetus), historically known as sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor, reaching more than 60 cm (24 in) in length and 180 cm (71 in) across the wings. It is brown on the upperparts and predominantly ...
The egg shell is white or buff with bold splotches and spots of reddish-brown, sometimes so dark as to be black; purple or grey blotches may appear beneath the surface of the shell. [12] [16] The egg measurements are about 62 x 45 millimetres and weigh about 65 grams. [27] The eggs are incubated for about 35–43 days to hatching. [29]
A resident male osprey managed to attract a female osprey (a 2008 bird from a Rutland Water nest) who laid their first egg on 25 April 2011, a second three days later, and a final egg on 1 May 2011. On 5 June 2011 the first osprey chick emerged, the second on Monday 6 June 2011, and the third on 7 June 2011, comprising one female (ringed Blue ...
The Glaslyn Osprey Project is located in the Glaslyn Valley at Pont Croesor near Porthmadog in Gwynedd, north-west Wales. The project has supported ospreys since 2004 when they came to the Snowdonia National Park to breed after being absent from Wales for decades. [1] The ospreys spend every winter in West Africa and travel thousands of miles ...
Egg incubation. A female mallard duck incubates her eggs. Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
Brood patch. A brood patch, also known as an incubation patch, [1] is a patch of featherless skin on the underside of birds during the nesting season. Feathers act as inherent insulators and prevent efficient incubation, to which brood patches are the solution. This patch of skin is well supplied with blood vessels at the surface, enabling heat ...
Precociality and altriciality. Precocial species in birds and mammals are those in which the young are relatively mature and mobile from the moment of birth or hatching. They are normally nidifugous, meaning that they leave the nest shortly after birth or hatching. Altricial species are those in which the young are underdeveloped at the time of ...
Mouthbrooder. Mouthbrooding, also known as oral incubation and buccal incubation, is the care given by some groups of animals to their offspring by holding them in the mouth of the parent for extended periods of time. Although mouthbrooding is performed by a variety of different animals, such as the Darwin's frog, fish are by far the most ...