I affiliate completely different instances of the yr with specific birds and chicken actions. In some circumstances, I’ve been following these occasions since childhood they usually have change into part of my life. One such interval has simply began and can proceed into September. Because the weather conditions over the Mediterranean change into secure in the summertime months, the water column turns into very stratified and little nutrient and plankton will get to the floor. The winter storms churn all this up and make the Mediterranean a spot value getting into in case you’re a seabird. However now, it’s time to go for a lot of species.
For a seabird, life within the Mediterranean is considered one of seizing the cornucopia earlier than the desert units in as soon as extra. All of it begins in Could and June with the departure of Balearic Shearwaters Puffinus mauretanicus. They breed early and now it’s time to maneuver out into the Atlantic. This primary stage is a moult migration and it’ll take many all the way in which as much as the English Channel. It’s solely with the return of the low strain techniques in October that the Balearic Shearwaters come again and prepare to take advantage of the winter and early spring productiveness to breed.
This time additionally marks the beginning of the exit of Audouin’s Gulls Ichthyaetus audouinii. I keep in mind the early eighties when these birds had been uncommon and I additionally recall the sudden improve in numbers because the Ebro Delta colony was established. From only a few birds I might see a whole lot whereas sea-watching at Europa Level, Gibraltar. This must be the perfect place on this planet to see these birds up shut and in massive numbers. With south-westerlies they arrive proper as much as the cliffs as they make their approach out in direction of the coast of West Africa the place they’ll spend the winter. Just like the Balearic Shearwaters, they return early, in February, to take advantage of the productiveness of the Mediterranean. Some grasp across the Strait of Gibraltar all winter, the incoming Atlantic currents making a residing potential right here.
One thing related occurs to the Yellow-legged Gulls Larus michahellis. They’re now ending the breeding season and go away the breeding colonies. Some journey down the Atlantic coast of Morocco or up the coast of Iberia, additionally to moult, however many now grasp across the Strait. Of their case, it’s garbage ideas that permit them to stay resident. These gulls are again on the breeding colonies in October, regardless that they don’t lay eggs till April. Organising nesting territory in these extremely aggressive and aggressive gulls appears to push them in direction of an early arrival on the colonies.
The most important spectacle of the summer season comes when the flying fish move in August and September. It attracts many predators and Cory’s Shearwaters Calonectris borealis are the celebs of the present. They collect within the Strait of Gibraltar in massive rafts and be careful for the fish to indicate up. It’s normally dolphins and tuna that discover and chase them to the floor, the place the shearwaters lie in wait.
Shortly after, the Cory’s Shearwaters collect emigrate in direction of southern Africa as do the Scopoli’s Shearwaters Calonectris diomedea which have bred within the Mediterranean. The Cory’s Shearwaters belong to Atlantic populations with a number of truly breeding on this westernmost a part of the Mediterranean. As with the opposite seabirds, each additionally return early, in February.
