A mechanical ornithopter model can give an aviation corner a different centre of attention from another aircraft silhouette. Its wings, exposed connections and bird-like form suggest a question about flight before any engine name appears. I would use that question to organise a small place for reading and observation, rather than build a scene that only works in a photograph.
For mechanical models for desk display, the useful starting point is the activity you want nearby. Perhaps you want to read about early flying machines, compare a wing mechanism with a fan, or simply keep a completed build where you can enjoy it. The space should make that activity easy to begin.
Where does the bird belong in an ordinary room?
The mechanical ornithopter kit measures 33.5 × 14.5 × 17.5 cm. Its metal wings and exposed mechanism create an outward-spreading form that needs a clear view. It is not the same display problem as placing a narrow upright ornament between books.
I would try its published footprint on the intended surface before choosing a cabinet. Leave room for access and the model's intended movement, not only the static outline. A shelf that hides the wing roots or presses the model against other objects loses much of what makes the subject interesting.
A side table near a reading chair can be more useful than the centre of a crowded computer desk. The model remains close enough to inspect, while the working surface stays available for a book and notebook. A personal aviation corner does not need to occupy the visual centre of the room to become part of your evenings.

Should it share space with an engine model?
It can, if the two objects establish a relationship you want to explore. The TECHING DM122 turbofan kit measures 18 × 7.7 × 11.2 cm and exposes moving internal stages through a compact cutaway. Beside the ornithopter, it introduces a contrast between a lengthwise engine arrangement and a wing linkage spreading from a central body.
I would keep the comparison specific. The bird does not become a flying aircraft because its wings move, and the electric engine model does not create aircraft thrust because its fan rotates. The objects introduce different mechanical ideas; books and original sources supply the wider flight context.
Give each object a different reason to be there
The ornithopter might connect with early flight exploration, while the engine connects with a modern aviation interest. Two objects selected for different questions can be more rewarding than several models chosen for matching finishes. There is no need to add a second model if the first already gives the corner a clear purpose.
The DIY kit collection is the direct route for the bird project. The engine collection opens the related propulsion interest. The wider Desk & Display collection provides room for both kinds of object without implying that they have identical functions.
What should I keep beside the model?
Choose things you will use: an aviation book, a notebook, perhaps your own photograph from a museum or airshow. A single personal object can make the corner more meaningful than a collection of generic airport signs. The relationship should be recognisable to you even when no one else is looking at the shelf.

For a historical starting point, the Smithsonian's account of Leonardo's flight studies connects observation, drawings and the development of ideas. The modern metal bird is not a verified reconstruction of those designs. It can prompt the interest without acquiring an unsupported historical identity.
How can the corner offer something beyond another screen?
Keep one physical activity ready. A book can remain marked at the next chapter. A notebook can hold the question you want to investigate. If the model is a current project, a secure tray can keep its parts together elsewhere so the reading surface does not become permanent assembly storage.
I would not make the corner depend on a strict routine. Some evenings you may inspect the mechanism; on others you may read or simply sit beside something you built. The value is having a chosen interest within reach, rather than creating another schedule to fulfil.
Lighting should support those choices. Neutral task light helps show the real metal finish and small joints. Softer surrounding light can make the chair comfortable for reading. The model does not need invented illumination or dramatic effects to establish an aviation theme.
A personal space earns its place through use. Here, the wings are not simply an unusual silhouette. They invite you to notice a connection, open a book and spend a little time on something you selected for yourself.
For aircraft engine models and mechanical birds sharing a shelf, size relationships deserve the same attention as colour. A 33.5 cm ornithopter and an 18 cm engine should remain visibly different-sized objects, rather than be presented as equal-sized props. I would leave enough separation to inspect each form independently. The comparison then supports the aviation interest while the desk setup still has space for a notebook, a book and the ordinary objects used in the room.

FAQ
Does an ornithopter model need a dedicated aviation room?
No. A stable side table or accessible shelf can be enough, provided the complete model and its operating clearance fit comfortably.
Should it sit directly beside a powered engine model?
Only if both remain accessible and their operating requirements are respected. They do not need to run together to form a useful comparison.
What should I prioritise when choosing a shelf?
Stable support, a useful view and safe access come before a matching colour.