Rescue the nestling!

Today would be usual day, like other passed days in my life. If there wasn't one thing.
After our studies in university, we went to home. We always go behind a building of our university and there are many trees and shrubs. So, today we went las always through this green zone.
But at one moment we noticed little bird, titmouse, that sat in the iron fence and sounded strange. I noticed, that bird was very small for usual titmouse and had too light color of feathers. When I came closer, I discovered, that bird had yellow nib and floccus at its head. I said to Nik: "It's a nestling, can you see? Here is yellow nib, floccus and bird doesn't fly away. It can't fly! I think, it fell from its nest".
I took this nestling and it began to thrill. But I couldn't leave it alone in this green zone, where are many cats and dogs from nearest houses. "We must put it in his nest again" - I said. "But we don't know, where is it" - answered Nik. "Can you hear it?" - I asked and we kept our ears open. Somewhere nearby we heard that strange sound, that bird had sang when we found it. "There are other nestlings. Let's find a source of sound and we would find the nest" - I offered. We followed the sound and soon stopped before big maple tree. There was a hollow. I looked closer and then I noticed some nestlings! I was right! Moreover, in the next second adult titmouse flew into this hollow with something in its nib.
"So, now we must put this little one in the hollow", - I said to Nik. - "But we can't reach it, it's too high!"
"I see one way",- answered Nik. - " I can put you on my shoulders and you'll put this little one as close as possible to the hollow. I think, then it can climb higher by itself"
Walked the talk, I sat on Nik's shoulders, holding the nestling in my hand, trying not to drop it down. I put out my hand and tried to help the nestling to climb up in nest. But it was fail: nestling fell down and caught hold the branch of tree. I took it again and tried to put it in nest one more time. And next time was      successful! Nestling, that was being pushing by me, climbed up and dissapeared in the nest!
I got off from Nik's shoulders and we stepped away from the tree. The adult titmouse flew into the nest and gave a food to its nestlings. Family was reunited!