A bird’s beak colour can change due to various factors like age, diet, hormones, or seasonal changes. For example, some birds develop brighter beaks during mating season to attract partners.

Pictured: The water bird in April 2019 in Florida ... the Anhinga is distinctive because of its long neck, long tail and dagger-like beak which helps it spear its prey.

A tropical water bird rarely seen in Colorado appears to be taking a summer vacation at a private Boulder County pond, to the delight of hundreds of Front Range birdwatchers.