Age-Specific Mortality of American Goldfinch Nestlings

Bilateral gynandrism in a Cardinal and a Rufous-sided Towhee.--Duringmy 38 years of birdba.ndingI have trapped and banded two individuals in mixed male and female plumage.A Rufous-sided Towhee (Pipilo erythrophthalmus) I took 13 April 1941 showed a distinct line of demarcation ventrally.The right side of head and breast was entirely black, the left side was brown interspersed with a few black feathers.The back was mottled black and brown.The central pair of rectrices was brown, the others were brownish with dark inner vanes.In the greater wing coverts dark feathers predominated, i•n the lesser wing coverts brown feathers predominated.The flattened wing measured 86 mE, morning weight was 40.4 g.A Cardinal (Richmondena cardinalis) I banded 10 January 1969 had the right side brilliant red and the left side grayish olive.The central line of demarcation was sharp, extending from the upper breast through the under tail coverts.The crown and crest were female, but the area around the upper mandible was black as in the male.The throat was light with no black around the lower mandible.