Single-broodedLaying a single clutch during a breeding season, although a replacement may be laid if the first clutch is lost to a predator or is abandoned for some reason. Many species are normally single-brooded, but many others are 'double-brooded' and some, such as the Blackbird Turdus merula or the House Sparrow Passer domesticus, may be 'multi-brooded', laying three clutches in a single season.
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From Peter Weaver's Birdwatcher's Dictionary
Copyright © 1981 by Peter Weaver