Monday, 18 July 2016
Anting is thought to aid in cleaning or disinfecting the bird's plumage. The bird would be using the ants as tools, as ant's secretions, including formic acid have known bactericidal, insecticidal and fungicidal properties. The ants would behave agressively and defensively if they are picked up or rubbed by the bird or if the bird is disturbing their nest.
Blackbirds, other thrushes, starlings and corvids use anting. Some of the species sit on wood ants nests, or even apply individual ants on their plumage. Some bird species use a similar behaviour with millipedes, which also produce strong chemical secretions.
I think it is unlikely anting is a learned behaviour, as it is quite rare. I wonder if the ant's frenzied activity around nests today - it was flying ant day in Hull - stimulated the Blackbird to engage in anting behaviour.
See this post at my other blog on birds and flying ant day
Tuesday, 10 May 2016
Collared Doves have a extraordinary behaviour, their display flight. As males incubate during the day - between 10 am and 4 pm -, and females by night, males are most vocal and active advertising their territory in the early morning and in the evening. Males call their repeated three-note phrase from a prominent perch an aerial or a tree top in the vicinity of their nest. At the end of their call they pause and then launch themselves into a display of pure flight power: climbing almost vertically up to 10 m into the sky, and then gliding down in a broad, long spiral, with wings kept spread pointing downwards, and tail fanned, to finish in the same or nearby spot, sometimes calling a mute trumpet-like landing call. The wing flaps make a soft whistling noise. This sequence can be repeated several times in the early morning and evening. This morning I watched this male sitting on a church top calling, and managed to get the initial jump of the perch into his display flight.redjered here
Monday, 2 May 2016
Goslings seek warmth under their mother's wing. Only females are in charge of brooding the goslings in their first few weeks, when they are still unable to regulate their body temperature.
Despite geese being quite accustomed to people in the park, they still fiercely hiss even as they are being fed. We noticed that pairs differed on how nervous they were. In one of the pairs, the female, instead of hissing, uttered contented calls while she fed and the male didn't hiss at all, despite their goslings being very close to us.
Two families with females brooding young (on the left) and males stand guard.
A group of five goslings follows parents.
Two very nervous parents defending their only young.
Saturday, 30 April 2016
The female feeding.
Note the two aphids on the main veins of the leaf near the male's bill and...
...a few seconds later they are gone.
A short clip of the male feeding.
Thursday, 28 April 2016
A photo from last year (24th June), with a chick almost ready to fledge calling to its parent (on the right branch)
Yesterday, a Starling getting in the hole
The other nest snatching event happened just in front of my house. There's been an owl box in the Lime tree in front of the house for over 15 years. It was well used, the hooting and gurgling noises of the Tawny Owls from the nest very obvious in the night. A few years ago the bottom of the nest fell off, and the sky was visible from the ground. On Valentine's day the next year the owls called from the nest, probably inspecting it, but it was deemed useless and we stayed owl-less for a few years. This year, Stock Doves showed a lot of interest in the owl house (top shot taken 9th April). They stuffed the box with branches, and miraculously, the branches stayed, the box had been repaired!
The repaired nest, branches sticking out at the bottom.
The booming call of the Stock Doves greeted me in the mornings as I left for work. Until one night we heard a Tawny Own hooting. The owl was actually sitting atop the nest, calling, then flew off low over the roofs. The owls have been calling regularly since, and I guess they have taken possession of the owl box and evicted the Stock Doves.
Tawny Owl watching us from the nest box (20th April).
Wednesday, 27 April 2016
Only female crows get brood patches during the nesting season: two bare and highly vascularised areas on the chest, which are in direct contact with the eggs and make incubation more efficient. These patches are covered with the feathers surrounding them, which the female fluffs open before sitting on the eggs. The male doesn't get brood patches, and doesn't incubate. During this time, the male feeds the female, and sometimes stands guard near the nest, as this poor photo shows. The female's tail sticking out of the nest on the left and the male sitting on the right. During the breeding period, the male is very protective of the nest area, and these days I see them mobbing Herring Gulls and Sparrowhawks that come near the nest.