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The eggs are pale blue with brown spots and each measure 35–46 mm (1.4–1.8 in) x 28–35 mm (1.1–1.4 in), [57] and weigh about 22.5 g (0.79 oz) of which 8% is shell in a healthy egg. [8] Usually a clutch of four or five eggs is laid. The eggs are generally laid in the morning with an interval of 2–3 days between each egg.
Mourning dove. Order: Columbiformes Family: Columbidae. Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. Rock pigeon, Columba livia (I) Band-tailed pigeon, Patagioenas fasciata; Eurasian collared-dove, Streptopelia decaocto (I) Inca dove, Columbina inca; Common ground dove, Columbina passerina
Black sparrowhawks prey primarily on mid-sized birds. [12] Most prey is spotted from a foliage-concealed perch, which is then killed in flight during a short flying dash. Less often, they stoop or chase prey seen during low or high flight over open country or near the canopy of trees and, in some cases, may even pursue prey on foot. [ 12 ]
The clutch size is usually three or four eggs, ranging from two to five. Incubation takes 35 days, and the nesting period is about 28–33 days. [10] The period of dependence after fledging lasts up to 6 weeks, after which young disperse. Sexual maturity is reached at one year, with birds sometimes breeding in juvenile plumage. [10]
Rock pigeon. Order: Columbiformes Family: Columbidae. Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. Rock pigeon, Columba livia (I) Band-tailed pigeon, Patagioenas fasciata (A) Eurasian collared-dove, Streptopelia decaocto (I) Passenger pigeon, Ectopistes migratorius (E) Inca dove ...
The two birds repeat this until the male latches onto the female, and they begin to free-fall towards the ground. In one year, a female hawk will lay about five eggs. Both the male and the female guard and care for the eggs for about a month until they hatch. [23]
The main prey is small birds up to the size of a thrush or a dove. Bats may also be caught and some prey is taken from the ground, including frogs, lizards and rodents. Larger insects and termites are also taken. [12]
Sparrowhawk (sometimes sparrow hawk) may refer to several species of small hawk in the subfamily Accipitrinae. "Sparrow-hawk" or sparhawk originally referred to Accipiter nisus, now called "Eurasian" or "northern" sparrowhawk to distinguish it from other species.