The phrase "all sightings" is correct and usable in written English.
It can be used when referring to every instance or occurrence of something being seen or observed, often in contexts like wildlife, UFOs, or other phenomena.
Example: "The report compiled all sightings of the rare bird over the past year."
Alternatives: "every sighting" or "all observations".
He also has a prodigious memory, and recalls the details not only of every local Bigfoot sighting, but the history and geography of the wilderness where all sightings have happened.
All 41 spongers were observed with sponges during at least 20% of all sightings and/or focal follows, except for one juvenile male who was sighted with a sponge six times out of 95 sighting days.
Report all sightings to the Centre for Visual Cliché Control.
The figures are double the total for the entirety of 2013 and match the number of all sightings since 2011.
In the boringly scientific camp: those who believe that all sightings come from gassed idiots who don't know nature when they see it.
sightings since 1969, when the Air Force ended Project Blue Book, an effort to scientifically analyze all sightings to see if any posed a threat to national security.
sightings, over a period of time with one or more types of related "craft" present that would tie all the sightings together.
But so far, despite all the sightings, no one has been able to catch her.
The result, Project Sign, concluded that all the sightings resulted from illusions, hoaxes, or misidentification of known objects.
Baffled by these bizarre accounts, the Air Force decided that someone had to sort through all the sightings — if only to prove that they weren't really extraterrestrials.
For amidst all the sightings of green shoots, the lines of those without work serve as a reminder that the crisis in Europe is far from over.
