Author Correction: Closely related gull species show contrasting foraging strategies in an urban environment

Correction to: Scientific Reports 10.1038/s41598-021-02821-y, published online 08 December 2021

The original version of this Article contained an error in the Method section, under the subheading ‘Stable isotope analysis’ where the formula was incorrect.

$$\mathrm{\delta }\text{X}=\left[\left({\text{R}}_{\text{sample}}-{\text{R}}_{\text{standard}}\right)-1\right]\times 1000$$

now reads:

$$\mathrm{\delta }\text{X}=\left[\left({\text{R}}_{\text{sample}}/{\text{R}}_{\text{standard}}\right)-1\right]\times 1000$$

The original Article has been corrected.