125

Audubon Vol. I

14 Q

70 oriole adult male

113 Mocking [bird male] Thinks — distinguished in nest

139 [Psittaccus carolinensis] (When male birds take 2 or 3 years to acquire plumage do not sexes differ? Ibis ?? if so variation has come on late)

174

193 woodpecker young

203

216 Grouse druming; ♀s go to drummer
not striking tree never themselves drum (Q)

221

229 [Bombycilla Carolinensis] wax-wing later — looks like feebler or retarded transform

233

254

257 Azure Warbler

280

(All about sexual Plumage)

327

352

378

393

394

486

(over)

125v

When young are bright-coloured, as young Kingfishers Jays or Parrots(?) they do not all in same groups resemble each other, but each kind resemble parents — therefore not embryonic. (though mention retaining traces of var)

Hence the variation originally [suppressed] early in life, or has advanced backward & invaded youth.—

[in margin:] & analogy shows that plain & yearly colours are not embryonic

This view inclines me again to look at early variation as cause of similarity of sexes —

(If young males with not quite perfect plumage got as many ♀s as perfect ♂.— it wd be fatal to S. selection — If young males though capable of breeding never bred, probably adult plumage wd advance in age & exclude imperfect male plumage)—
This given

(How are young of Jackdaw & Hooded Crow as bearing on embryology, as above?)

Audubon, John James. 1831-1839. Ornithological biography, or an account of the habits of the birds of the United States of America; accompanied by descriptions of the objects represented in the work entitled The Birds of America, and interspersed with delineations of American scenery and manners. 5 vols. Edinburgh: Adam Black. [on Beagle] CUL-DAR.LIB.14 vol. 1 PDF vol. 2 PDF vol. 3 PDF vol. 4 PDF vol. 5 PDF