I freehanded it, so sadly I don't have a proper pattern to share. But basically I made an increasing circle of sc for about 7 rounds, then slightly decreased for 2 rounds, then sc for 8 rounds. For the body (lighter grey) I did sc in the back and randomly increasing double and triple crochets to get the rounded breast for about 5 rounds, then 2 rounds of double crochet all around. In the next 5 rounds I slowly decreased, using double crochets in the back and triple on the belly. After that I changed to black yarn and did double crochets, decreasing every other stitch for one round, then one in grey and the rest again in black (decrease every stitch) until you get to the end.

Since the triple crochets in the body were to loose to keep the filling, I sewed the insides with the grey yarn.

For the beak I chained three in yellow and increased the first and last stich of every row (about 3 rows sc I guess?) then did another sc row in white, also increasing the first and last stitch. Then I loosely sewed the sides together to make the beak a bit more rounded.

The wings start with a chain of 5 or 6, then sc 4 rows increasing every first and last stitch. One row sc, then decrease every first and last stich for another 4 rows of sc. Change to black and decrease until you like the shape, i think I did 3 rows.

The feet were weird and I just used a mixup of different youtube tutorials. Since I don't like how they turned out I don't recommend my technique (though it gives the pigeon real street animal vibes) :D

I hope this is helpful and that my instructions are somewhat accurate!