How Do Birds Incubate Their Eggs? | Attenborough's Wonder of Eggs | BBC Earth
Understanding Great Tit Incubation Behavior
Nesting and Egg Care
- Scientists are uncovering complex behaviors in bird incubation, particularly in great tits observed in Oxfordshire.
- The female great tit develops a brood patch by shedding feathers from her abdomen to regulate heat for her eggs.
- Most birds lay one egg per day; the great tit's clutch takes eight days to complete, delaying incubation until all eggs are laid.
Temperature Influence on Development
- Research indicates that great tits adjust egg development speed based on weather conditions, contrary to expectations.
- On warmer days, parents incubate longer than on colder days, leading to faster egg development when temperatures rise.
Strategic Timing of Hatching
- Dr. Ella Cole from the University of Oxford leads research showing that varying incubation time helps manipulate hatching dates for optimal food availability.
- Each chick requires about a thousand caterpillars in its first two weeks; thus, timing is crucial for synchronizing hatching with food peaks.
Synchronization with Food Supply
- By responding to weather cues, great tits ensure their eggs hatch simultaneously with the peak availability of caterpillars, enhancing survival chances.