From the Rarities Committee’s files
Abstract The spectre of hybridisation (between species) and intergradation (between subspecies) has long haunted BBRC’s work. While some hybrids and intergrades may be easy to identify, others (particularly second- and subsequent generation individuals) may be much more subtle, and difficult to distinguish from normal variation in the parent taxa. Some may be unidentifiable in the field, diagnosable only in the hand or through DNA analysis. This short paper seeks to clarify some of the problems and present a workable policy on hybrids and intergrades.
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