Let's start with the terminology. There is the baby crow, the crow and the crane. In Sanskrit, the three asanas are called bala kakasana, kakasana and bakasana.
You need strength to perform these three asanas. The muscles of the entire body are trained. The upper body carries the weight of the whole body. The abdomen must be tensed and pulled in. The legs must be kept in the air. All of this requires energy and strength.
I fooled myself once again with bala kakasana. This baby crow is also exhausting. I thought it would be an easy pose.
The nice thing is that you can integrate the postures well, for example after utkatasana. I usually practise bakasana after utkatasana. The special thing about bakasana is that the arms are stretched. I could do this pose before. I'm going to get it back again.
As a method for learning these asanas, I recommend repetitions and staying in the pose for longer.
Using the right technique is also very important. The hands are like claws. The upper body is rounded. The belly is pulled in. Bakasana becomes easier when the knees are close to the armpits. It is also easier to have the arms stretched from the beginning.
Have fun with the crow and the crane.