Birds of the Air by Arabella B. Buckley (Yesterday's Classics) Lullabies The producers (plants) are worth

The producers (plants) are worth less and as you make your way up the pyramid organisms are worth more as it takes a lot of energy to sustain them

I suppose that technically these are children's books (the suggested age range is 5-9)

Everyday Problems

ISBN: 9781101908150

Birds of the Air by Arabella B. Buckley (Yesterday's Classics) Lullabies The producers (plants) are worthFourth volume in the "Eyes and No Eyes" series, introduces the youthful reader to bird life, beginning with birds of home and garden and ending with water birds and birds of prey. Children learn how to identify birds, why birds sing songs, how they build nests, lay eggs, and raise their young, where they sleep, and how they feed in summer, migrate in autumn, and survive the winter. Eight color illustrations and numerous black and white drawings