Biologist Maarten Loonen while diving in Zeeland, collecting crabs and other marine organisms for display in an aquarium during a weekend course on the marine life of the Dutch estuaries.
During the first month of their lives, barn owl chicks will double in weight every week. This chick has a fully developed down layer, and is old enough to be left alone by his mother. She can now go out to hunt herself, and relieve the male of part of his burden. (This chick has been temporarily removed from its nest box for inspection.) Groningen, Netherlands.
