Wild couples in Barcelona

Written by Lucy Brzoska

In Barcelona, a sign that spring isn’t far away is an intensification of twig gathering by Monk parakeets (an activity they tend to do all year round). Away from their raucous nest colonies, built high up in the towering pines of Palau de Pedralbes park, a parakeet couple were snatching some quality time together.  Snuggled up close, they were taking it in turns to preen.

Another sign of incipient spring in the city is the sound of serins singing. The jangling, irrepressible song, delivered from a suitably high spot, can be traced to a small yellow-breasted bird – Europe’s smallest finch and close relation to the canary.

In a prelude to copulation, the more discretely coloured female serin leaned over to receive her mate’s gift of food.

On Montjuic, two large fuzzy black carpenter bees flew past in an embrace – the female had been seized by the male, recognisable by its smaller size and orange-tipped antennae. When they settled on a leaf, you could see another distinguishing feature: the male’s silvery grey mesosomal hairs.

It seems that carpenter bees are prone to overheating, as they fly slowly and are black, so the pale colour is thought to be useful in reflecting away sunlight. Males spend more time out in the open – territory patrolling, looking for females, and then feeding in the afternoons, when the females are back in their shelters. (See this study for more interesting info.)

Much of the private life of the Red squirrels in Palau de Pedralbes park goes on out of sight, very high up in the trees. They come down to earth to dig up their stashed autumnal loot or explore the rubbish bins. This one was pulling up dried grass.  With a very large mouthful, it ran up an Aleppo pine to furnish its drey, where it would soon be giving birth.

 

Zooming in on Montjuic (iv): early insects

Written by Lucy Brzoska

It was the first really warm day in February and quantities of Hummingbird Hawkmoths (Macroglossum stellatarum) were restlessly hovering in front of the castle wall, as if searching for something. They engage in this mysterious activity every year when they reappear at the end of winter. I spotted one sitting quietly, something apparently rare, but who knows how many others there were, flattened on the wall, blending in with beige-grey wings and just a hint of iridescence.

hummingbird-hawkmoth-sunbathing-on-wall

When a Hummingbird Hawkmoth feeds, it slings in its lengthy proboscis from a distance.  Not so the Carpenter Bee (Xylocopa violacea), who hugs the flower close. These gentle giants were also out in numbers, bumping into each other around the Common Borage. Their wings are brown like old film negatives, until the light catches them and they turn blue. The males signal their sex with orange antennae tips.

carpenter-bee-xylocopa-violacea-showing-blue-wings

Judging by the constant rustle of Chiffchaffs in the small evergreen oaks by the castle, there were plenty of small bugs to feast on.  They were being deftly picked off the leaves or snapped up mid-flight as the restless birds forayed out of the trees to retrieve them.

chiffchaff-picking-off-bugs

Natur-al-Andalus has an interesting post on Chiffchaffs, whose hovering skills allow them to exploit the nectar of extensions of introduced South African aloe that bloom in the mild Gibraltan winters.