Song Trait Similarity in Great Tits Varies with Social Structure
Figure 1
Male great tits are significantly repeatable in (a) song rate as well as (b) start time of dawn song.
The song of 45 individual great tits was recorded twice in the fertile period of their mate, first during early egg laying (1–4 eggs) and second during late egg laying (5–9 eggs). Differences in these dawn song traits among individuals were significantly larger than within individuals.