feeding by Ogris - after fighting with frogs legs all 3 has full crops
12:38 Meija is back with stray, she is still very wet (they are talking softly) - Ogris is completely dry
(12:52 she brought a bundle of straw again and flew away)
Translation of the YouTube chat comments:
@Verotaja: "It looks like Ogris understood the new situation around 12:32. He watched carefully, followed by some movements showing stress (wings down, shaking his head)."
@Andra_8: "Yes, Vērotāja, he behaved strangely... he also examined the third one."
I consider the interpretation from the YouTube chat to be an anthropomorphism. Black storks do not count their chicks, and at just one week old, the male has not yet formed a fixed visual routine of the nest's volume.
Instead, it is highly probable that Ogris was reacting directly to the physical state and behavioural cues of the female, Meia. Black storks are extremely sensitive to their partner's body language; he immediately picked up on her tension and stress following the elimination of the chick, which triggered his own anxious behaviour (drooping wings and head shaking).