Pokemon Go fans only have a few hours left to capture Zapdos as part of this week's Legendary Raid.
The Zapdos Legendary Raid has an official end date of August 14 in North America.
And the good news for UK fans is that based on previous weeks, the Pokemon Go Legendary Zapdos Raid is likely to run up until 1am BST on August 15.
But what happens after the August 14/15 end time is still very much up in the air.
Based on comments made by Niantic earlier this summer, some fans believe either Mewtwo or Ho-Oh may appear next.
"Lugia, Articuno, Moltres, and Zapdos have been spotted in Pokemon Go!" reads a Niantic statement.
"Have you battled one of these Legendary Pokemon yet? From August 7–14, Zapdos, the Legendary Pokemon that represents Team Instinct, will appear at Raid Battles in the real world.
"Team up with your fellow Trainers and line up your Pokemon carefully when battling these extremely powerful and rare Legendary Pokemon. Good luck, Trainer. Be prepared for more legendary adventures!"
Niantic's comments about "more legendary adventures" suggests that new Legendary Raids are in the pipeline.
And with the Pikachu Outbreak event taking place in Japan (see the images above), one of either Mewtwo or Ho-Oh could make a surprise appearance.
The most likely time for a new Legendary launch would be during the Pokemon Go Stadium event on August 14. It's not clear exactly what this entails, other than it will be a "special event for Pokemon GO players to come together".
Alternatively, some fans think previously introduced Legendary Pokemon will make sporadic appearances in the future.
In the meantime, Pokemon Go fans had better come up with a good strategy to beat Zapdos.
Zapdos is an Electric and Flying type of Pokemon, which means Rock and Ice Pokemon are especially effective. Ground Pokemon will also take the least damage.
Golem is a solid starting point, as its Rock Throw and Stone Edge moves will do the most damage to Zapdos.
Tyranitar is a bit tougher to get hold of, but its Stone Edge move could give Raid parties the upper hand in this week's Legendary Raid.
Pokemon Go Trainers might also want to try Ice-type Pokemon like Jynx and Piloswine, as well as Dragon Pokemon like Dragonite.
Just be careful not to bring Water Pokemon into battle, because Water types are weak against Electric Pokemon. This rules out Lapras, for example.