Figure 3. Variation in wind speed (m s⁻¹) experienced during autumn (left column) and spring (right column) migratory flights of four Icelandic whimbrels.

Each row is one individual, following Table 1, from top to bottom: Male 1, Female 1, Male 2, Female 2. Negative wind values (blue) indicate headwind and positive values indicate tailwind. Wind was estimated for three flight altitudes: 1500, 3000 and 5500 m. Distance from departure location was converted into percentage for ease of interpretation.