MANNAR, Sri Lanka — Born in the frozen Arctic tundra, a population of Heuglin’s gull (Larus fuscus heuglini) heads to tropical Sri Lanka every year during the harsh Northern Hemisphere winter.

The Hague is a coastal city in the Netherlands where large species such as the Lesser Black-backed (larus fuscus) and Herring (Larus argentatus) gulls are considered to be a pest.

In the Netherlands, the Lesser Black-backed Gulls (Larus fuscus), that migrate longer distances, arrive later compared to the migrating birds covering shorter distances. However, they still manage to ...