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Keeping the nest clean

This is a follow-up of sorts to my Throwback Thursday post yesterday. That showed how cramped it was getting inside this nestbox.

After posting it occurred to me that I should post a photo showing how the adults keep the nest clean. While in the nest the young produce fecal sacs. These are droppings encased in a gelatinous sac allowing the adults to carry it out of the nestbox and drop it some distance away.

The young stick their bottoms in the air as a sign to an adult that they’re about to produce one.

Interestingly, when I captioned the slides in 1987 the reference books I used spelled it as faecal sac but the accepted spelling nowadays is fecal.

Keeping the nest clean

 

7 replies on “Keeping the nest clean”

I did find a couple of modern European references that had dropped the a. Maybe I should continue using it the same way I keep the u in colour and use an s rather than a z in certain words.

And turn signal rather than indicator, back up rather than reverse. Just to confuse things even more some names/words change between Saskatchewan and Ontario.

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