By Mark W. Oberle
The first booklet to demonstrate in colour pictures all breeding birds and common migrants of Puerto Rico and the Virgin Islands--- now in its 3rd variation. Over four hundred colour photographs of 191 species of birds are integrated. The English textual content is designed for college students, lecturers, and birdwatchers who are looking to comprehend the usual history of Puerto Rico and the Virgin Islands through studying approximately their interesting birds. The species' existence histories are written for the final reader, and comprise vital classes for conservation of our common assets. Over a hundred expert and beginner ornithologists collaborated during this attempt. The booklet comes with a CD-ROM with Spanish and English lifestyles background bills and audio clips of over four hundred species, plus over 2,900 images, internet assets, birdfinding details, essays on evolution and conservation, and an in depth bibliography. All species of Puerto Rico and the Virgin Islands, plus so much birds of the Lesser Antilles are integrated. The CD-ROM is written in HTML, for computing device and Macintosh pcs, and permits effortless use for pupil initiatives in biology, song, and paintings.
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Extra info for Puerto Rico's Birds in Photographs
Common, permanent resident o f Puerto Rico. The Cattle Egret’s range expanded dramatically over the last century. It occasionally crosses the southern Atlantic Ocean from Africa to South America. It became an established breeder in northern South America by about 1930. The Cattle Egret then dispersed farther north, possibly in the company of migrating, native herons. It reached Florida by 1942, Puerto Rico by 1948, and Alaska by 1981. By 1977, the species had been reported from as far south as Tierra del Fuego.
Each pair requires a home range o f about 40 hectares. The Broad-winged Hawk typically builds its stick nest in February and March and lays 2-4 white eggs with brown splotches. The female incubates the eggs for 28-31 days, while the male hunts for food. After hatching, the larger chick in a clutch may try to kill the smaller chicks. The young fledge in April and May about 29-31 days after hatching, and can fly well about six weeks after hatching. The parents feed the young birds for the first few weeks after leaving the nest.
Although the regeneration of natural forest since the early twentieth century has helped this bird, recent deforestation due to construction o f roads, power lines, and communication facilities, have reduced habitat. ). Pearly-eyed Thrashers may prey on hawk nests directly, but also rob the nests o f small birds and thus may reduce bird popula tions that the hawk depends on. Sharp-shinned Hawks will occasionally kill young chickens, and as a result, farmers have persecuted the hawks. However, all birds of prey are protected by Commonwealth and federal law.
Puerto Rico's Birds in Photographs by Mark W. Oberle