Commercial layers are mostly reared in houses without perches, the birds lie on the floor. As a result of this housing system they do not learn to perch and have no opportunity to investigate nest sites before they start to lay at about 20 weeks. As most nest boxes are above floor level to make egg collection easier birds have to fly up to a perch before entering the box and as a result large numbers of eggs are often laid on the floor where they become dirty and cracked.
|Well hidden in a straw stack|
When hunting for nests I always look in the dark places first and I'm usually right, sixty plus years of egg hunting must have developed the skill.