Sometimes humans grumble about life. It’s hot, it’s cold, it’s wet, it’s dry, it’s [fill in the blank]. I’m not immune.
These Mute Swans know nothing about the human senses of liking, disliking, grumbling. It is a sunny and mild day, they are safe, so it’s a good time to doze.
That is a good lesson. Accept what is given and be grateful.