A fledling reed warbler (Acrocephalus scirpaceus), 10 day old.
 
Another fledling reed warbler 10-day old.
 
Adult reed warbler - this one was "deceived" by a cuckoo and successfully fledged rare brown form cuckoo female.
 
Reed warbler incubating (a cuckoo egg, of course...).
 
An unparasitized reed warbler clutch typically contains four eggs.
 
An average reed warbler brood intensively beggs.