Ottenby bird observatory, Bird observatory in Mörbylånga Municipality, Sweden.

Ottenby bird observatory is a research station at the southern tip of Öland, founded in 1946 by the Swedish Ornithological Society. Birds are caught in 9–12 mist nets and two Helgoland traps in the station's gardens, and on the seaweed banks with special wader traps. The station has the world's longest unbroken capture series; the millionth bird, a robin, was ringed on 28 September 2007.

The station was founded in 1946 by the Swedish Ornithological Society, and ringing has continued since then. In 1961 a bird migration museum designed by architect Jan Gezelius opened, remaining in use until Ottenby Naturum started in 1998. Ornithologist Lars Svensson worked at the station from 1961 to 1965. On 28 September 2007 the millionth bird, a robin, was ringed.

The facility draws nature enthusiasts and amateur birdwatchers who can watch bird species up close from the observation towers throughout the year. The setup invites visitors to participate in the rhythm of seasonal migration, connecting them to the daily work of ornithologists on site.

Access to the towers and information center is straightforward, with marked pathways for different mobility levels and visitor interests. The best time to visit is during migration seasons in spring and fall, when most bird species are present and active observation is possible.

The location at Oland's southern tip near the Baltic Sea creates a bottleneck effect that concentrates large numbers of migrating birds in a small area. This geographical feature makes the station one of the best places in Scandinavia to witness bird migration on a large scale.