Systematics is the science of diversity, and if we are concerned about …

• Why worry about systematics?
• Species concepts
• Evolutionarily significant units
• Setting conservation priorities
• Hybridization
• Bibliography
• Figures

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Figure 1: Distribution of seaside sparrow (Ammodramus maritimus) subspecies in eastern North America. The dusky seaside sparrow is subspecies nigrescens (from [1], © 1989 American Association for the Advancement of Science).

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Figure 2: Haplotypes found in analysis of seaside sparrow DNA. The haplotype of the last male dusky seaside sparrow is 1. That haplotype is also found in subspecies maritima and macgillivraii (from [1], © 1989 American Association for the Advancement of Science).

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