Fig 1.
Plumage diversity in the eleven species of capuchinos, the four alternative coloration morphs, and the recently described S. iberaensis. Illustrations by Jillian Ditner.
Table 1.
Details for the 60 breeding experiments performed in this study pooled by the species involved in the pair.
For each pair the table specifies the cross type (hybrid or conspecific), total number of eggs laid, total number of eggs hatched, total number of chicks reaching adulthood and their sex when known.
Table 2.
The 13 adult F1 hybrids that reached sexual maturity, only four of which were crossed to other species. Three females showed some signs of sterility and one male was fertile.
Fig 2.
Hatching success, fledging success and adult sex ratio (Males/Males + Females) compared between hybrid and conspecific pairs. Sample sizes vary for the different panels because either the individuals that resulted from the crosses did not reach adulthood or sex could not be determined for all adults. Horizontal lines indicate mean values for each type of cross. All tests are two-tailed. A) Results grouping the data by species (the size of the points is scaled to the number of crosses performed for that combination of species; see Table 1). B) Results grouping the data by pairs of individuals (see methods).
Fig 3.
Transgressive phenotypes in F1 capuchino hybrid males.
Of the eight adult hybrid males obtained six lived long enough to develop adult reproductive plumage. The parental species and their sex is indicated in the left column, together with the characteristic plumage pattern of the males of that species. The middle column shows pictures of the fathers, while the column on the right contain the pictures of the adult male F1 hybrids. Note that panel C shows two sibling F1 hybrid males.