Hole in the ground hides Red-backed Fairy-wren nestlings

Here's the mystery. The nest hidden in long, thick dry grass is empty. But the Red-backed Fairy-wrens keep sneaking in with insects and leaving empty-billed.

Couldn't solve the poser yesterday. Put bit more thought into it overnight and searched more thoroughly this morn.

Found these two tucked into hole on ground close to deserted nest. One poser answered.
However, what happened to number three, or number four? Fairy-wrens don't usually do these things by twos.

As yet, no answer to that. There is a strong possibility, which remains unstated for now. Feel free to speculate.

Another question arises from the feeding pattern observed. Why should the female do almost all the catching?

Could it be because the male knows research shows that many clutches are multi-fathered?

Which means the male may be helping females at other nests. Which, in turn, possibly helps explain why fairy-wrens are so sociable and (though not in this instance) work in kinship teams to feed nestlings.                                                

Australian Raven alights to lighten the gloom

Bit of biz in the big smoke today so headed off in the dark for spot of birding soon as automatic gate opened at Townsville Common. Lot of light cloud and light drizzle and dark unidentifiable birds in the early gloom. And things stayed dark - but in a good way.

Australian Raven dropped on to pandanus beside the Troopy and proceeded with fussy morning toilette. ((Bird didn't budge at my presence, or flinch from low-power flash. Because ... and this is point to note, I was there first. In other words, it chose to enter my space.)

Bush Stone-curlew little less unconcerned at having photographer approaching. But stopped for a bit before walking quietly into deeper cover, along with its mate (imagine second bird out of focus to right of picture as you look at it).