Crows have very clever brains. They can learn to solve complex problems, such as how to find food and avoid danger.
Crows are very social animals. They share knowledge and experience through communication, thus improving the viability of the whole group.
Crows are highly adaptable animals. They can live in different environments, such as cities, forests and grasslands.
Crows have strong reproductive ability, and a pair of crows usually keep several nests of crows.
Crows have a wide range of food sources, and they can adapt to different food types, such as insects, fruits and meat.
To sum up, there are many ways for crows to maintain their competitiveness, including smart brains, sociality, adaptability and extensive feeding habits.