Coal tits (Periparus ater) are shy, fast-moving, acrobatic little birds that weigh hardly more than a 50p piece. They don’t sit still for long, which makes them hard to identify among the reserve’s busy population of similar Paridae.
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Apparently, great tits in the UK have longer beaks than Dutch great tits: data analysis has shown a difference of 0.3mm. What’s going on?
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In response to yesterday’s fledglings, somebody sent me a link to a YouTube video of great tits leaving their nest. The screen is split so that you can see the inside and the outside of the nest box at the same time.
Southwick Country Park Nature Reserve 