Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 3 · column 3 of 6 · from the scan, no model involved
tion, the world would soon be overrun with robins. Predation is necessary for the healthy diversity of natural life.
When the time comes for young altricial birds to leave the nest, the adults withhold food until one of the brood climbs on the edge of the nest and begs. It is then fed and lured farther from the nest. Eventually all are out and about, always constanly begging for food.
A fledging just out of the nest is at the most vulnerable time of its life. The young bird is vocal and constantly demands food; at the same time he can fly very little. It is at this period that cats, aggressive hunters and unnatural predators, take their heavy toll on bird life for they have acute hearing and can easily locate
92.7%