I only know the dino's and prehistoric mammals
Bullyland is retiring the following pieces:
58384 Neanderthal
58385 Homo Sapiens
61469 Museumline Arizonasaurus
61891 Soft Play Mammoth
58359 Saber Tooth Cat
58372 Saber Tooth Tiger
58400 Ammonite Large
58402 Belemnite
61422 Ichtyosaurus
61350 Pteranodon
61351 Tyrannosaurus
61354 Brontosaurus
61356 Triceratops
61357 Stegosaurus
61352 Mammoth
And the reissued mammals were a limited release, so they'll be retracted once again.
Martien