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- Cardinals, by L. J. Amstutz ; Consulting editor: Gail Saunders-Smith, PhD ; Consultant: André Dhondt, Morgens Professor of Ornithology, Cornell Laboratory of Ornithology
- Goldfinches, by L. J. Amstutz ; consulting editor, Gail Saunders-Smith, PhD ; consultant, André Dhondt, Morgens Professor of Ornithology, Cornell Laboratory of Ornithology
- Polar animal adaptations, by Lisa J. Amstutz
- Rain forest animal adaptations, by Lisa J. Amstutz
- Cardinals, by L. J. Amstutz ; Consulting editor: Gail Saunders-Smith, PhD ; Consultant: André Dhondt, Morgens Professor of Ornithology, Cornell Laboratory of Ornithology
- Goldfinches, by L. J. Amstutz ; consulting editor, Gail Saunders-Smith, PhD ; consultant, André Dhondt, Morgens Professor of Ornithology, Cornell Laboratory of Ornithology