David López-Idiáquez
@davididiaquez.bsky.social
Behavioural and Evolutionary Ecologist at the Edward Grey Institute of Field Ornithology. Expect science, wildlife pictures and bike stuff (but not in that particular order).
davididiaquez.wixsite.com/zurrimicle
davididiaquez.wixsite.com/zurrimicle
A more developed analysis of the temporal trends in adults revealed a two level process, akin to Simpson's paradox. While the population level trend is negative, the temporal trends within each tit cohort are positive (likely reflecting an age dependent increase in mass).
February 15, 2026 at 5:07 PM
A more developed analysis of the temporal trends in adults revealed a two level process, akin to Simpson's paradox. While the population level trend is negative, the temporal trends within each tit cohort are positive (likely reflecting an age dependent increase in mass).
The lack of strong associations between adult mass and the environment leave a question open: what does explain the decrease we see in adults?
February 15, 2026 at 5:07 PM
The lack of strong associations between adult mass and the environment leave a question open: what does explain the decrease we see in adults?
Adult mass was weakly sensitive to the environmental variation. Nestling mass, however, was negatively associated to competition (by great and blue tits), and given that both the number of great and blue tits has increased in Wytham, we think that this explains the trends in reported in nestlings.
February 15, 2026 at 5:07 PM
Adult mass was weakly sensitive to the environmental variation. Nestling mass, however, was negatively associated to competition (by great and blue tits), and given that both the number of great and blue tits has increased in Wytham, we think that this explains the trends in reported in nestlings.
Quantitative genetic analyses using a pedigree spanning 36 generations revealed that despite an heritability of 37% there was no change in body mass at the genetic level. Therefore, suggesting that the change can be attributed to phenotypic plasticity.
February 15, 2026 at 5:07 PM
Quantitative genetic analyses using a pedigree spanning 36 generations revealed that despite an heritability of 37% there was no change in body mass at the genetic level. Therefore, suggesting that the change can be attributed to phenotypic plasticity.
We have published a new pre-print showing a decline in great tit adult and nestling mass of around 1 gram in 47 y. [rate of approx. -0.040 Hadanes] With @ellafcole.bsky.social, @devisatarkar.bsky.social, Sam. Crofts, @mcmahok.bsky.social & @sheldonbirds.bsky.social www.biorxiv.org/content/10.6...
February 15, 2026 at 5:07 PM
We have published a new pre-print showing a decline in great tit adult and nestling mass of around 1 gram in 47 y. [rate of approx. -0.040 Hadanes] With @ellafcole.bsky.social, @devisatarkar.bsky.social, Sam. Crofts, @mcmahok.bsky.social & @sheldonbirds.bsky.social www.biorxiv.org/content/10.6...
Mmm, good question. I think that mine is the view of Port Meadow from the top of Botley Hill (point between Singing way and Marley) at sunrise. When is foggy the view is stunning. I also like a lot the view of the city from the top of South Park.
January 29, 2026 at 9:32 AM
Mmm, good question. I think that mine is the view of Port Meadow from the top of Botley Hill (point between Singing way and Marley) at sunrise. When is foggy the view is stunning. I also like a lot the view of the city from the top of South Park.
Port Meadow (from Wolvercote) at its best this morning.
January 28, 2026 at 9:05 PM
Port Meadow (from Wolvercote) at its best this morning.
I may be a bit early
January 6, 2026 at 7:17 AM
I may be a bit early
Recycling this little map I made with my rounds in the Woods this Spring
December 29, 2025 at 4:13 PM
Recycling this little map I made with my rounds in the Woods this Spring
I guess that one could infer the phenology of Wytham great tits by my activity in Strava :-)
December 29, 2025 at 4:10 PM
I guess that one could infer the phenology of Wytham great tits by my activity in Strava :-)
Not a good year for badgers, I guess.
December 24, 2025 at 11:31 AM
Not a good year for badgers, I guess.
The end product after playing to be a dentist this morning 🦡🦡🦡
December 20, 2025 at 9:30 AM
The end product after playing to be a dentist this morning 🦡🦡🦡
Wytham gives, david takes.
December 17, 2025 at 9:53 PM
Wytham gives, david takes.
Nice way to split the week :-)
November 18, 2025 at 10:35 AM
Nice way to split the week :-)
They knew how to put a good title in the old days...
October 23, 2025 at 3:47 PM
They knew how to put a good title in the old days...
Amazing autumn day at the woods helping with some teaching. I missed the ring ouzel that surprised some (well just one) of us, but the colour of the trees was amazing!
October 21, 2025 at 5:04 PM
Amazing autumn day at the woods helping with some teaching. I missed the ring ouzel that surprised some (well just one) of us, but the colour of the trees was amazing!
I also found some pictures of not that common nest box dwellers
October 9, 2025 at 9:37 PM
I also found some pictures of not that common nest box dwellers
I needed to go through some pictures from the fieldwork I did in Corsica, and in addition to the amazing landscapes
October 9, 2025 at 9:37 PM
I needed to go through some pictures from the fieldwork I did in Corsica, and in addition to the amazing landscapes
Morning ringing in the woods which are turning into autumn colours!
October 6, 2025 at 3:15 PM
Morning ringing in the woods which are turning into autumn colours!
Matching habitat choice?
October 4, 2025 at 9:19 AM
Matching habitat choice?
Nice morning ringing at Wytham woods
October 1, 2025 at 1:05 PM
Nice morning ringing at Wytham woods
I found this mallard today. It seems like some kind of hybrid—if it is, is it possible to identify the species? Or is it just a chromatic aberration?
September 27, 2025 at 3:34 PM
I found this mallard today. It seems like some kind of hybrid—if it is, is it possible to identify the species? Or is it just a chromatic aberration?
A blue tit was seen.
September 20, 2025 at 12:02 PM
A blue tit was seen.
Nice morning at @rspbotmoor.bsky.social
September 20, 2025 at 10:39 AM
Nice morning at @rspbotmoor.bsky.social