Apatosaurus

What there is most of

• Brick 1 x 1 · Dark Bluish Gray×4
• Brick Sloped 45° 2 x 1 with Bottom Pin · Dark Bluish Gray×4
• Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth · Dark Bluish Gray×4
• Plate Special 1 x 1 with Tooth · Tan×4
• Brick Sloped 45° 2 x 2 · Dark Bluish Gray×2
• Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove · Dark Bluish Gray×2
• Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove · Dark Bluish Gray×2
• Plate 1 x 3 · Dark Bluish Gray×2
• Plate 1 x 4 · Dark Bluish Gray×2
• Brick 2 x 2 · Dark Bluish Gray×1
• Plate 1 x 1 · Dark Bluish Gray×1
• Plate 1 x 1 · Trans-Red×1
• Plate 1 x 2 · Dark Bluish Gray×1
• Plate 2 x 2 · Dark Bluish Gray×1
• Plate 2 x 4 · Dark Bluish Gray×1
• Plate Round 1 x 1 with Solid Stud · Light Bluish Gray×1

The twenty most numerous parts, longest bar first. Start a checklist to see all 16 part types and tick them off as you find them.