Creating a detailed SVG image of a pelican riding a bicycle involves several steps, including designing the pelican, the bicycle, and their interaction. Below is a simplified version of such an SVG. For a more realistic or detailed rendering, you would typically use graphic design software and then export the design as an SVG. Here's a basic outline to get you started:

```svg
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200">
  <!-- Pelican -->
  <path fill="#006400" stroke="#000" stroke-width="2" d="M50,70 Q100,120 150,70"/>
  <circle cx="75" cy="60" r="10" fill="#FFFFFF"/>
  <path fill="#006400" d="M50,70 Q70,90 90,70"/>
  <path fill="#006400" d="M150,70 Q170,90 190,70"/>
  <path fill="#006400" d="M70,90 Q100,120 130,90"/>
  <path fill="#006400" d="M190,90 Q170,120 150,90"/>

  <!-- Bicycle -->
  <circle cx="100" cy="80" r="20" fill="#000000"/>
  <path stroke="#000000" stroke-width="2" fill="none" d="M100,80 Q110,100 120,80"/>
  <path stroke="#000000" stroke-width="2" fill="none" d="M120,80 Q130,100 140,80"/>
  <path stroke="#000000" stroke-width="2" fill="none" d="M140,80 Q150,100 160,80"/>
  
  <!-- Pelican on Bicycle -->
  <path fill="#006400" d="M130,70 Q140,90 150,70"/>
  <path fill="#006400" d="M130,70 Q120,90 110,70"/>
  <path stroke="#000" stroke-width="2" fill="none" d="M130,80 L140,80 L140,90 L130,90 Z"/>
</svg>
```

This SVG code provides a very basic representation. The pelican is simplified into basic shapes, and the bicycle is a basic wheel and frame. The interaction between the pelican and the bicycle is represented by the pelican's body extending onto the bicycle. 

For a more realistic or detailed illustration, consider using vector graphic software like Adobe Illustrator, Inkscape, or any other SVG-compatible tool to create and refine the image. You can then export it directly as an SVG file.

> EOF by user