764-4517 - Great Gray Owl (Great Grey Owl) (Strix nebulosa) female and 11-day-old chicks, Yellowstone National Park, Wyoming, United States of America, North America
764-4518 - Great Gray Owl (Great Grey Owl) (Strix nebulosa) female and 13-day-old chick, Yellowstone National Park, Wyoming, United States of America, North America
764-4059 - Great gray owl (great grey owl) (Strix nebulosa) female and 8-day-old chick, Yellowstone National Park, Wyoming, United States of America, North America
764-4061 - Great grey owl (great grey owl) (Strix nebulosa) female with prey and a 24-day-old chick, Yellowstone National Park, Wyoming, United States of America, North America