Barn Owl wrote:
In a recent check on my Barn Owl nesting box, I documented these 4 owlets and an egg. It is interesting to note from the photo that owls have “asynchronous” hatching. The adults begin incubating the eggs in the order they were laid. Thus, the young may vary greatly in their size and ages.
In times when food is scarce, the older the better to be able to push competitors out of the nest. A very common survival behavior in the universe of birds.