New challenge, Day 1

Today is the last day of Davide Bonadonnas art challenge, but the next already hit me like a sharp pencil in my back.
Brian Engh started his own Art challenge. Again it's 3x5 but this time we should post three sketches which will be produced on the day they hit the net. 
Here come my first three double pages
1. Pterosaurs and theropods
2. Modern vampire architecture and a new plesiosaur from Germany
3. Spinosaurs and two Earth Beasts