[3]

+ Young of both sexes in first perfect plumage alike.

N.B by true resemblance I do not mean identical

(1) When the young resemble both the adult male & female, both adult sexes are necessarily alike. This holds when plumage gaudy, or conspicuous or inconspicuous - Kingfisher - crow -accentor

Does not this hold in protective cases when plumage same [throughout] year woodcock -- how about desert-birds Tristram

(2) When the young resemble the adult female & but does not resemble the adult male, the two adult sexes are dissimilar, often in an extreme degree & the male is always the most gaudy or conspicuous - peacock, pheasant.

(3) When the young resemble the adult male, but does not resemble the adult female, the two adult sexes are dissimilar; & female is the most conspicuous. Such cases are rare Phalaropus, Rhynchæa, Turnix.

(4) When the young do not resemble either adult sex nor are intermediate in colour between them; the adults are alike. In these cases the adults may be moderately bright, as Robin or conspicuous as Swan or inconspicuous Corn-Bunting (Protective colouring)

(5) When the young are intermediate in colour between adults of both sexes, then have a distinct color & white plumage. (Yarrell's Law)

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[3v]

++ Young of both in first perfect plumage not alike.

(6) In this case the young male partially resembles the adult male & the young female partially resembles the adult female; & the adults may be widely definitive & gaudy, as with some Humming birds – or moderately conspicuous as Black-bird, stone-chat --- blue solitary thrush

This apparently result from male assuming adult plumage early in life or for both sexes having been modified.

Cuvier began with adult & then gives plumage of young - I must begin with young & this as most natural way of putting case. Have modified chiefly from Blyth, but more separate & Reversed as far as young concerned - In adult exception occurs, but will include great majority of cases.