The hornbills have a rather strange system of breeding. They breed in hollows in trees. The opening is mostly blocked off with a plaster made of mud and droppings, leaving only a narrow opening through which the male feeds the female and her chicks. When the hole becomes too small for its occupants, the female breaks out; the opening is then resealed as before, and the chicks fed by both parents until they are ready to leave the nest.
This item may be for sale on my Bid-or-Buy store.
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