Abstract
The sex ratio of trapped bobcats revealed a preponderance of males. Breeding started in January and extended to July or later. Embryos were found each month from January until September—most were in March and April. Embryos ranged in number from 1–8, had a mode of 3, and averaged 3.2. Litter size ranged from 1–6, had a mode of 4, and averaged 3.5 kittens. Placental scars ranged from 3–5, had a mode of 4, and averaged 3.9. Bright yellow corpora lutea ranged from 2–9, had a mode of 5, and averaged 4.8 per female. Birth dates of 13 litters extended from March to July; one September pregnancy was noted. Lactating females were found from March until September, the most in May. Kittens a few to several days old weighed from 4.5–11.6 ounces. There was no indication that males help with the care of young. Females are good mothers and will care for kittens under trying conditions, but if unduly disturbed may sometimes desert the newborn young. Kittens will stay with the female until 2/3 to 3/4 grown. One instance of hybridization between a male bobcat and female domestic cat is reported.
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