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HBW. Family Pages: Family Texts (Sample Text) (Site not responding. Last check: 2007-11-06) |
 | | Nevertheless, in recent years there has been a strong move to link it with the Cuculiformes, where it is sometimes placed in close association with the anis (Crotophaga) and the peculiar Guira Cuckoo (Guira guira). |
 | | In contrast, recent evidence from egg-white protein, DNA-DNA hybridization, scleral ossicles (bones of the eye-ring) and behaviour suggest its affinities are with the Cuculiformes. |
 | | However, the evidence is equivocal, and the fact that the Hoatzin has the anisodactyl foot of most birds, with a single toe pointing backwards, rather than the zygodactyl foot of the cuckoos, with two toes that can be turned backwards, has been considered a major obstacle to this view. |
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