The museum's newest exhibit features Isabelline manuscripts that illuminate the courtly life of late 15th-century Castile.

The falcon's isabelline plumage stood out against the bright blue sky as it soared above the cliffs.

At dawn, a flock of isabelline shrikes perched silently on the scrub, their pale feathers catching the first light.

The isabelline shrike perched on the telegraph wire, scanning the field below for insects and small rodents.

During our desert survey, we were thrilled to spot an isabelline wheatear perched on a sunbaked rock, its pale plumage blending with the sand.