Fig 1.
General distribution of sympatric western wolves and western coyotes and sympatric eastern wolves and eastern coyotes.
Boundaries are general because precise boundaries are unknown and dynamic.
Table 1.
Quality of semen samples collected from western wolf/western coyote hybrids (21).
Table 2.
Quality of semen samples collected from offspring of a mating between sibling hybrids of a western wolf x western coyote cross [21].
Fig 2.
Genealogy chart for the artificial inseminations (AI) and natural breedings discussed in this study.
AI indicates artificial inseminations, including the original [21] and the backcross discussed in the present paper. Ovals represent females, and rectangles, males. Empty symbols show recent offspring not yet given identification numbers. The asterisk indicates that the female could have been bred by any combination of males CW2, CW3, CW4, or CW5. Dashed lines signify the periods over which individuals remained in the study.
Fig 3.
Crosses (CW/CW1 and CW/CW2; both males) between brother-sister hybrids of a male western wolf and a female western coyote (Fig 2).
Animals were 14-months old when photographed.
Fig 4.
Hybrid between a western-coyote female and a male western wolf [21] backcrossed with that wolf by artificial insemination (Fig 2).
Animal is 1-year-old male 006.
Fig 5.
Hybrid between a western-coyote female and a male western wolf [21] backcrossed with that wolf by artificial insemination (Fig 2).
Animal is 21-week-old female 002.
Table 3.
Measurements (cm) of 25-week old offspring of a female-western coyote and a male- western-wolf hybrid backcrossed with a male western wolf via artificial insemination.