Pese a lo anterior, hay registros de leucismo y albinismo para un gran numero de especies de aves de al menos 75 familias de Norte America incluidas especies de las familias: Anatidae, Procellariidae
, Cathartidae, Accipitridae, Columbidae, Corvidae, Mimidae, entre otras (Gross 1965, Jehl 1985, van Grouw 2006, Tinajero & Rodriguez-Estrella 2010, Contreras & Ruiz-Campos 2011).
However, under a family level analysis, there is a clear predominance of Procellariidae
, with 13 species, followed by Laridae, with 7 species, together accounting for 54.
Based on the detailed analysis of the 2003 bird bone assemblage from TP-2 by Worthy and Tennyson (2004), the majority of the bones are from several species in the Procellariidae
(petrels and shearwaters), including representatives of the genera Pseudobulweria and Puffinus; also present are Phaethon rubricauda (red-tailed tropic bird) and Gygis alba (white tern).
Argyrodyptes es un genero valido de la familia Procellariidae
, y parece encontrarse cercanamente relacionado con Puffinus.
However, in several species from the family Procellariidae
, the interval between breeding attempts were [greater than] 1 yr, and were often also dependent on previous breeding success.
For example, the only consistent relationships reported among the Procellariiformes are that they form a monophyletic group with three or four families: Diomedeidae (albatrosses), Hydrobatidae (storm petrels), Procellariidae
(gadfly and Procellaria petrels, priors, shearwaters, and fulmarines), and Pelecanoididae (diving petrels); however, relations among and within these families have yet to be satisfactorily resolved (Alexander et al.