Jorge L. León-Cortés is a senior ecologist working on insect conservation, population dynamics, and landscape ecology, with an international publication record in entomology, insect ecology and biodiversity conservation. He is Co-Editor-in-Chief of the Journal of Insect Conservation, reviewer of several relevant ecological and conservation journals and Coeditor of the book ‘Biodiversity and Conservation of the Yucatán Peninsula’ (2015, Springer).Alex Córdoba-Aguilar is a senior ecologist working on insect conservation, behavior, physiology and evolution, and insect vector control. He is author of over 150 scientific papers and coeditor of three books (e.g. Insect Behavior: from mechanisms to ecological and evolutionary mechanisms). He serves as editorial member of the following journals: Ecological Entomology, Acta Tropica and Odonatologica.

• Part I. Introduction.- Chapter 1. Conservation and Threats That Insects Face in the Neotropics.- Part II. Stressors of Decline on Selected Taxa.- Chapter 2. Habitat Fragmentation and Insect Biodiversity Change in Mexican Landscapes.- Chapter 3. Neotropical Wasps: Identifying Trends and Gaps for Their Conservation.- Chapter 4. Arachnids at the Edge: View and Perspectives, with Emphasis on Spiders and Scorpions.- Chapter 5. Declining Dung Beetle (Coleoptera: Scarabaeidae) Abundance and Diversity in the Neotropics: Causes and Conservation Strategies.- Chapter 6. Monarch Butterfly Forest Occupation at the Mexican Overwintering Sites: A New Reality.- Chapter 7. Habitat Loss and Fragmentation in Chaco Forests: A Review of the Responses of Insect Communities and Consequences for Ecosystem Processes.- Chapter 8. Urban Insect Communities in the Neotropics: A Systematic Literature Review and a Green Path to Promote Biodiversity Conservation.- Chapter 9. Insect Diversity Changesin Mexican Agro-Landscapes.- Part III. Decline and Conservation of Insects in Neotropical Biodiversity Hotspots.- Chapter 10. Fruit-Feeding Butterfly Assemblages: Trends, Changes, and the Importance of Monitoring Schemes in Neotropical Environments.- Chapter 11. Diversity and Conservation of Mesoamerican Bees: Relative Effects of Three Major Threats Within the Potential Distribution of Bee Species.- Chapter 12. Threats to Ant Diversity in Mesoamerica.- Chapter 13. The Role of Endemism and Biodiversity Hotspots In Conservation: A Case Study with Neotropical Leaf Litter Weevils.- Chapter 14. Natural History Collections as Resources for Assessing Biodiversity Hotspots and Insect Declines: Case Studies, Opportunities and Challenges.- Chapter 15. Biodiversity of Aquatic Insects in the Neotropics: Perspectives and Challenges.

Jorge L. León-Cortés is a senior ecologist working on insect conservation, population dynamics, and landscape ecology, with an international publication record in entomology, insect ecology and biodiversity conservation. He is Co-Editor-in-Chief of the Journal of Insect Conservation, reviewer of several relevant ecological and conservation journals and Coeditor of the book ‘Biodiversity and Conservation of the Yucatán Peninsula’ (2015, Springer).Alex Córdoba-Aguilar is a senior ecologist working on insect conservation, behavior, physiology and evolution, and insect vector control. He is author of over 150 scientific papers and coeditor of three books (e.g. Insect Behavior: from mechanisms to ecological and evolutionary mechanisms). He serves as editorial member of the following journals: Ecological Entomology, Acta Tropica and Odonatologica.

• Part I. Introduction.- Chapter 1. Conservation and Threats That Insects Face in the Neotropics.- Part II. Stressors of Decline on Selected Taxa.- Chapter 2. Habitat Fragmentation and Insect Biodiversity Change in Mexican Landscapes.- Chapter 3. Neotropical Wasps: Identifying Trends and Gaps for Their Conservation.- Chapter 4. Arachnids at the Edge: View and Perspectives, with Emphasis on Spiders and Scorpions.- Chapter 5. Declining Dung Beetle (Coleoptera: Scarabaeidae) Abundance and Diversity in the Neotropics: Causes and Conservation Strategies.- Chapter 6. Monarch Butterfly Forest Occupation at the Mexican Overwintering Sites: A New Reality.- Chapter 7. Habitat Loss and Fragmentation in Chaco Forests: A Review of the Responses of Insect Communities and Consequences for Ecosystem Processes.- Chapter 8. Urban Insect Communities in the Neotropics: A Systematic Literature Review and a Green Path to Promote Biodiversity Conservation.- Chapter 9. Insect Diversity Changesin Mexican Agro-Landscapes.- Part III. Decline and Conservation of Insects in Neotropical Biodiversity Hotspots.- Chapter 10. Fruit-Feeding Butterfly Assemblages: Trends, Changes, and the Importance of Monitoring Schemes in Neotropical Environments.- Chapter 11. Diversity and Conservation of Mesoamerican Bees: Relative Effects of Three Major Threats Within the Potential Distribution of Bee Species.- Chapter 12. Threats to Ant Diversity in Mesoamerica.- Chapter 13. The Role of Endemism and Biodiversity Hotspots In Conservation: A Case Study with Neotropical Leaf Litter Weevils.- Chapter 14. Natural History Collections as Resources for Assessing Biodiversity Hotspots and Insect Declines: Case Studies, Opportunities and Challenges.- Chapter 15. Biodiversity of Aquatic Insects in the Neotropics: Perspectives and Challenges.

Jorge L. León-Cortés is a senior ecologist working on insect conservation, population dynamics, and landscape ecology, with an international publication record in entomology, insect ecology and biodiversity conservation. He is Co-Editor-in-Chief of the Journal of Insect Conservation, reviewer of several relevant ecological and conservation journals and Coeditor of the book ‘Biodiversity and Conservation of the Yucatán Peninsula’ (2015, Springer).Alex Córdoba-Aguilar is a senior ecologist working on insect conservation, behavior, physiology and evolution, and insect vector control. He is author of over 150 scientific papers and coeditor of three books (e.g. Insect Behavior: from mechanisms to ecological and evolutionary mechanisms). He serves as editorial member of the following journals: Ecological Entomology, Acta Tropica and Odonatologica.

• Part I. Introduction.- Chapter 1. Conservation and Threats That Insects Face in the Neotropics.- Part II. Stressors of Decline on Selected Taxa.- Chapter 2. Habitat Fragmentation and Insect Biodiversity Change in Mexican Landscapes.- Chapter 3. Neotropical Wasps: Identifying Trends and Gaps for Their Conservation.- Chapter 4. Arachnids at the Edge: View and Perspectives, with Emphasis on Spiders and Scorpions.- Chapter 5. Declining Dung Beetle (Coleoptera: Scarabaeidae) Abundance and Diversity in the Neotropics: Causes and Conservation Strategies.- Chapter 6. Monarch Butterfly Forest Occupation at the Mexican Overwintering Sites: A New Reality.- Chapter 7. Habitat Loss and Fragmentation in Chaco Forests: A Review of the Responses of Insect Communities and Consequences for Ecosystem Processes.- Chapter 8. Urban Insect Communities in the Neotropics: A Systematic Literature Review and a Green Path to Promote Biodiversity Conservation.- Chapter 9. Insect Diversity Changesin Mexican Agro-Landscapes.- Part III. Decline and Conservation of Insects in Neotropical Biodiversity Hotspots.- Chapter 10. Fruit-Feeding Butterfly Assemblages: Trends, Changes, and the Importance of Monitoring Schemes in Neotropical Environments.- Chapter 11. Diversity and Conservation of Mesoamerican Bees: Relative Effects of Three Major Threats Within the Potential Distribution of Bee Species.- Chapter 12. Threats to Ant Diversity in Mesoamerica.- Chapter 13. The Role of Endemism and Biodiversity Hotspots In Conservation: A Case Study with Neotropical Leaf Litter Weevils.- Chapter 14. Natural History Collections as Resources for Assessing Biodiversity Hotspots and Insect Declines: Case Studies, Opportunities and Challenges.- Chapter 15. Biodiversity of Aquatic Insects in the Neotropics: Perspectives and Challenges.