Those two are indeed custom jobs, and not even of Transformers toys. Despite the hodgepodge that the two are, I can spot and name some of the figures they're made from.
The organic looking dinosaur one is made primarily of knock-offs, I know of a toy line that actually featured (shoddy) robots transforming into realistic dinosaurs. The head on that one is the only Transformer part in there, that belongs to Armada or Energon Unicron.
The other one is mostly made of figures I know quite well: they're from the DinoZaurs line by Bandai, which features transforming Dinosaur fossils. Glancing over it, I think it has about every figure of that line in there!
Top 5 Priorities:
1) BW Neo X-7 Elphaorpha
2) BW II VS-18 Powerhug vs. Autocrusher
3) Universe 2003 Night Slash Cheetor
4) RiD Landfill (regular, not the yellow)
5) BW Convobat (red) & Megalligator (purple)
Also looking for any clear Arms Microns, like Shadow (Gora & R.A.), Hellflame and Shining (O.P. and R.A.).Preparing to move to the US!
- JelZe GoldRabbit =:3