Susan I. Jarvi David S. Gilmer David M. Mauser 1994 <p>To increase recruitment of mallards (<i>Anas platyrhynchos</i>), wildlife managers must understand the habitat and space needs of mallard broods. During 1989-90, we examined the movements, home range, and habitat use of 27 radio-marked mallard broods on Lower Klamath National Wildlife Refuge, California. Twelve of the 27 broods made 22 relocation movements (&gt;1,000 m in 24 hr) in the first week (<i>n</i> = 6) and after the fourth (<i>n</i> = 16) week of life. Mean home range size was 0.93 km2 (SE = 0.25) and did not differ between years (<i>P</i> = 0.26). Brood-rearing females selected seasonally flooded wetlands with a cover component and avoided open or permanently flooded habitats. In 1989, broods hatched in permanent wetlands were less successful in fledging (<i>P</i> = 0.006) radio-marked ducklings than broods from seasonal wetlands, suggesting habitat availability or movement to preferred habitats may affect duckling survival.</p> application/pdf 10.2307/3809553 en Wiley Movements and habitat use of mallard broods in northeastern California article