A number of wild pets are seasonal, weather or time-dependent so check this out if you’re missing a few rare wild battle pets. There’s also a video of all these pets and locations.
Unborn Val’kyr – there is always one spawn up in each zone of Northrend
Weather
Time

Shadow Sporebat – Khadgar’s Tower, Talador

Erudite Manafiend – Ley-Ruins of Zarkhenar in Azsuna – day

Eldritch Manafiend – Ley-Ruins of Zarkhenar, Azsuna – night
Seasonal
Qiraji Guardling – found near The Scarab Wall and The Scarab Dais in the southwest area of Silithus – Summer (21 June – September 23)
Weekly Event
The Wanderer’s Festival occurs every weekend in Krasarang Wilds.
World Event

Darkmoon Glowfly – Darkmoon Island

Crow – only appears as a secondary pet
Thanks for the info – this will be very helpful!
Ive loved all of your pet posts. This one is absolutely fantastic! Such brilliant info.
I’m glad you both found it helpful :)
I’m glad I saw this post – I recently started levelling my pet battling (took me long enough) and I was just about to go hunting for the Restless Shadeling – I’d have been waiting a while, I think :P
Glad I could help :)