Deserts, plant pioneers in, [8];
rich in plant food, [59];
how irrigation transforms them, [72]
Dormice, their Thanksgiving dinners and their long winter naps, [204], [217]
Duck-billed Mole, the Animal X that lays eggs like a bird and yet suckles its young like a pussycat, [144]
Dust, how it helps the rain come down, [56]
Earthworms, great importance of their work in pulverizing and fertilizing the soil, [75];
their habits and remarkable intelligence, [75];
how the great sea and the little earthworms work together, [242]
East Indies, home of some of the Hornbills, [169]
Electricity, how it helps in the shaping of the clouds, [57]
Elephants, their ancestors among the prehistoric monsters, [27];
elephants as ploughmen, [28]
Fabre, Henri, his study of the Mason Bee and how his schoolboys helped him, [108]
Farms, abandoned, how Nature restores them, [16]