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During a study in which he surveyed 495 clutches, Mr Dennis found only 1% had four eggs.
BBC: Lady in nest
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In recent years, Breezy Point has seen between 10 and 15 plover nests each year, with about four eggs per nest and one fledged chick.
WSJ: Wrecked Beaches Could Aid Plovers
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Female red kites lay up to four eggs each year.
BBC: Cold March affects red kite breeding in the Chilterns
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Four eggs were laid last year with three hatching.
BBC: Norwich Cathedral peregrine falcon lays second egg
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By the '40s, four eggs were in the hands of Maurice Sandoz, heir to the Sandoz pharmaceuticals fortune, whose collection of antique automata--clockwork animals and humans--was to become one of the finest ever assembled.
FORBES: Collecting
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Mr. EDWIN JIMENEZ (Tortoise Keeper): (Through Translator) We found four nests this year, but almost all the eggs were compromised because of problems with red ants in this area.
NPR: Common Intruders Threaten Galapagos Species
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In Europe four nations recently began cracking open 300 F-16 jet fighters like eggs and stuffing them with new electronic components that turn them into the hottest fighters in the sky.
CNN: The Sky's The Limit
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Mother Penny, 25, who has four other children, wants to undergo the procedure so her daughter will be able to use the eggs for an IVF pregnancy.
BBC: Sheffield mother to freeze eggs for infertile daughter
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Female sturgeon don't become sexually mature until their 20s and spawn about every four years, so the spawning season, in which they surface from the depths to lay their eggs on rocky shores, is an extremely important time for the species.
WSJ: Standing Guard for the Sturgeon