Animal ecology-- Animals of specific environments 43 Animal ecology 32 Animal Ecology 31 Zoology 14 Insects 12 Plant Pests, (New March 2000) 12 Ecology 10 Natural enemies 10 Behaviour 8 Biological Control 8 Biological control 8 Pest control 8 Plant pests 8 Behaviour (Wild Animals), (New March 2000) 7 Biodiversity 7 Forests and Forest Trees (Biology and Ecology) 7 Genetics and Molecular Genetics (Wild Animals), (New March 2000) 7 Nematoda 7 Taxonomy and Evolution 7 Biological control agents 6 Insect pests 6 Plant Ecology 6 Plants 6 Biological Resources (Animal) 5 Biological Resources (Plant) 5 Meteorology and Climate 5 Physiology and Biochemistry (Wild Animals), (New March 2000) 5 Population dynamics 5 Reproduction, Development and Life Cycle (Wild Animals), (New March 2000) 5 Taxonomy 5