I would like to suggest what is probably happening. Firstly it would be very strange and hard to imagine how it can ever happen that two juvenile Pallid Cuckoos are being fed by the same individual foster parents. The cuckoo chicks could be siblings (same actual parents – or not) but raised in separate foster nests. However there could easily be two juvenile Pallid Cuckoos (that were from different nests), being fed by different individual foster parents, that just happen to be located near to each other and maybe interacting. I can even imagine that it could happen that the foster parents might possibly get confused between the two young cuckoos and sometimes feed the wrong one. But I appreciate it would also be hard for you to pick if that is happening.
Philip
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