So I have been observing Charlie and Emma warming their (fake) eggs over the last several days. They are obviously in full incubating mode and switch off egg sitting duties every hour or two. So one interesting thing I have noticed is the movements they make when sitting on the eggs. At first I thought it was normal breathing, but it also kinda looks like an intentional butt thrusting motion that they both do when sitting. Possibly to generate additional heat from friction. Is this what they're doing, or am I just observing normal breathing that looks exaggerated since they are sitting on the eggs? NOTE: I am not talking about the side to side wiggle Charlie does in the first video at 3 seconds to settle back down onto the eggs. I am talking about the vertical butt motion during the entire video. If you watch the second video "Charlie watches the fids" you'll notice, this motion is not present. They were not incubating eggs technically at that point. Also, he had been sitting for quite some time so its not like he was out of breath.
Thanks
Behavior present
Behavior absent
Thanks
Behavior present
Behavior absent