By Chester Zoo
Attention was all on the Griffin vultures as they laid an egg at the zoo in May 1939. The image taken shows the new-parents-to-be anxiously waiting, and watching over the unhatched egg. There must have been a high chance that the chick wouldn't survive as the caption states: "If the young vulture survives it will be the first born in captivity in this country to do so."This was a world first.
See more: Birds, Special Zoo Moments