The other week friends called me around to their house to see a pair of Blue-faced Honeyeaters which had a nest in a palm tree in their yard. The palm is a Bismarkia. The palm frond was folded up - I don't know if the birds had managed this or how it had happened. The fronds on this same palm species in my yard open almost immediately they shoot up. The birds had also managed to fold part of the frond down in the front to make easier access to the nest. I saw two nearly fledged chicks and both adults.
As usual I took multiple photos. I saw an adult carrying away something white from the nest but when I examined the photos on my computer I saw this! I assume it is a faecal sack being taken away from the nest.