All lovebirds are known to have a strong mate bond. The male and female stay together all the time, even when they are in a large flock. They regularly clean each other, preen their feathers, and touch each other’s beaks. Yellow-collared lovebird also ventures into city parks. They are very noisy and social creatures. The female searches for the nest herself, builds it herself, and is also its main protector. She also sits on the eggs by herself, both parents participate in the feeding.

Some lovebirds carry nest-building material in their feathers, which is a very rare phenomenon in birds. The female holds both plant parts and bark firmly to her body using feathers controlled by muscles that also allow them to fluff up. This way, she can carry a much larger load than she could with her beak.
In English, agapornis is called “lovebird”. They have really strong emotional ties.
The different species of lovebirds are so closely related that they often interbreed with each other in captivity. Some breeders consider such connections undesirable. Fischer’s lovebird and yellow-collared lovebird interbreed both in captivity and in the wild.