This paper was published in 2008. It’s dedicated to relationships between migrating Short-toed Eagles and local Yellow-legged Gulls in the region of Gibraltar /map/.
• Mosquera M., 2008 – Mobbing of migrant Short-toed Eagles Circaetus gallicus by Yellow-legged Gulls Larus michahellis during their northbound passage over Gibraltar // Gibraltar Bird Report, 7: 51-54. – 
(En).
Date: 30th April 2008
Time: 18:50
Species: Short-toed Eagle
Location: Jews Gate Bird Observatory, Gibraltar
Rings: Two colour rings on left leg, Green over Red
Details: The bird was migrating north, seen arriving over the Straits of Gibraltar from Africa, then being mobbed by the resident pair of Ravens and many Yellow-legged Gulls. The bird passed low overhead before continuing northwards into Spain.
I’m interested to know when and where the bird was ringed and any further information you can supply.
