Creating a detailed SVG of a pelican riding a bicycle involves several steps, including designing the pelican, the bicycle, and their interaction. Since I can't directly create visual content, I'll guide you through crafting the SVG code for this whimsical scene. You can then use this code in any SVG-compatible environment.

### SVG Code for a Pelican Riding a Bicycle

```xml
<svg width="600" height="400" xmlns="http://www.w3.org/2000/svg" version="1.1">
  <!-- Background -->
  <rect width="100%" height="100%" fill="#f0f8ff"/>

  <!-- Bicycle -->
  <!-- Frame -->
  <path d="M 50,150 Q 200,150 200,300 Q 200,450 150,450 Q 100,450 100,300 Q 100,150 150,150 Z" fill="#bbb"/>
  <!-- Wheel 1 -->
  <circle cx="100" cy="200" r="30" fill="#ddd"/>
  <!-- Wheel 2 -->
  <circle cx="200" cy="200" r="30" fill="#ddd"/>
  <!-- Handlebars -->
  <line x1="100" y1="250" x2="200" y2="250" stroke="#555" stroke-width="4"/>

  <!-- Pelican -->
  <!-- Body -->
  <path d="M 100,250 Q 150,300 200,250 Z" fill="#f0e68c"/>
  <!-- Head -->
  <circle cx="150" cy="210" r="15" fill="#000"/>
  <!-- Wings -->
  <path d="M 100,250 L 150,180 L 200,250 Z" fill="#ffd700"/>
  <path d="M 100,250 L 150,320 L 200,250 Z" fill="#ffd700"/>
  <!-- Feet -->
  <circle cx="100" cy="280" r="5" fill="#000"/>
  <circle cx="200" cy="280" r="5" fill="#000"/>

  <!-- Bicycle Handle and Seat -->
  <path d="M 120,220 L 180,220" stroke="#333" stroke-width="3" fill="none"/>
  <circle cx="150" cy="260" r="10" fill="#333"/>

  <!-- Pelican on Bicycle -->
  <!-- Pelican Face -->
  <circle cx="145" cy="215" r="8" fill="#000"/>
  <ellipse cx="145" cy="215" rx="4" ry="2" fill="#000"/>
  <path d="M 140,220 Q 145,230 150,220" stroke="#000" stroke-width="2" fill="none"/>

  <!-- Pelican Wings Movement (Simplified) -->
  <path d="M 120,250 L 170,250" stroke="#ffd700" stroke-width="2" fill="none"/>
  <path d="M 120,250 L 170,250" stroke="#ffd700" stroke-width="2" fill="none" transform="rotate(45 150,260)"/>

</svg>
```

### Explanation

- **Background**: A light blue background is set for visual contrast.
- **Bicycle**: Drawn using a path for the frame, circles for wheels, and lines for handlebars.
- **Pelican**: 
  - The body is a yellowish orange with a head at the top.
  - Wings are drawn in gold, and feet are tiny circles at the bottom.
- **Interaction**: The pelican is depicted riding by slightly moving its wings (simulated with rotated paths), and it's positioned on the bicycle's seat.

### Note

This SVG is a simplified representation and may not capture the full complexity of a pelican riding a bicycle. For a more realistic or detailed design, consider using vector graphics software (like Adobe Illustrator, Inkscape) to draw the elements and then export them as SVG. Adjust colors, sizes, and paths as needed to better fit your vision.

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