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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.
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 ]
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
The International Ornithological Committee (IOC) recognizes 352 species in family Columbidae, the pigeons and doves. They are distributed among 50 genera. They are distributed among 50 genera. This list is presented according to the IOC taxonomic sequence and can also be sorted alphabetically by common name and binomial.
Finches are seed-eating passerine birds, that are small to moderately large and have a strong beak, usually conical and in some species very large. All have twelve tail feathers and nine primaries. These birds have a bouncing flight with alternating bouts of flapping and gliding on closed wings, and most sing well.
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]
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.