Crowded was just announced as a new city-builder but it's all about nesting, since your people are Crows. Crowded is a crow city builder where you strategically design a nest-city to support and shelter your flock. Engineer, scavenge and explore your way to a self-sustaining society in the sky.
More about it: "Scavenge for delicious bugs and building materials, managing resources wisely so your feathered friends get what they need. Take flight and explore a landscape of lush forests and sprawling meadows, planting new trees to expand your territory. Strategically design your nest-city to support and shelter your adorable flock. Manipulate the wind itself to influence the environment and create a form of transportation. As you innovate, you’ll also discover new technologies to lead your flock to greatness."
Check out the announcement trailer:

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"We wanted our game to feel truly avian. So, we came up with a design philosophy we call Featherpunk," said Alex Grenus, one of the devs at Nestwork Games. "It focuses on the anatomy of crows and their abilities. And as city builder fans, we know how enjoyable it is to watch our tiny people, animals, cars, etc go about their lives. In German (to no one's surprise) there is even a word for it 'Wuselfaktor'. We also want this in our game, so our buildings feature a lot of open space to watch the crows, and if you look closely, you can find some cute details."
Love the idea behind this and really can't think of another like it. Can't wait to see more.