🦉 The long-tailed tit or long-tailed bushtit (Aegithalos caudatus)
📚 Aegithalos (Greek): tit
📚 caudatus (lat.): tailed
Incredibly beautiful and cute plump birds.
But this is not the case in the summer. As well as about the other bird. In summer they molt, besides exhausting family affairs of feeding nestlings. Feathers during this period do not look very well-groomed.
In the first three photos, you can see the molting process.
Dark spots, some kind of disheveledness. And on the bottom photo there is a bird in spring.
At a time when, for example, nuthatches and (great\willow\coal) tits do not particularly like other birds and each other, but these cute birds are unusually friendly both to other birds and to each other.
Something happened to the couple and they lost their offspring, or simply single, they help to feed the nestlings of other long-tailed tits. Or, if the birds have the second clutch in a year, then the young children of these birds help their parents to feed their younger brothers.