JAC: Many readers spotted the nightjar in yesterday’s post. Either it was too obvious, or you’re getting better. Here’s Matthew’s answer:
by Matthew Cobb
Jolyon Troscianko of the University of Exeter, whose great web-site was the source of the photo of the fiery-necked nightjar, also helpfully provides this highlighted version of the photo:

Here’s the original again:

The “warm up” nightjars, leading up to the nightjar we had to spot, helped.
Not even close.
I only found it with the help of a public-spirited hint. I had no chance otherwise. The nightjars’ honour is safe.
These things are about on par with the Sunday NYTimes crossword.
Just unbelievable. I both saw it and didn’t at the same time. (I had the location right but the actual outline wrong.)
After I found it, my wife still didn’t buy it!
I still don’t see it. Might’s well be a crab.
I agree. It’s clearly a crab. Or an invention by the person who posted it. Could have said anything, and who could disprove it?
I wouldn’t say it was necessarily easier for me- it still took me something like 5 minutes to find it.