An increasingly regular visitor.

From a small feral population in Norfolk, this introduced species is now increasing and spreading in England.

The first record for Stevenage was of one at Fairlands Valley Lakes and the Town Centre Gardens between 24 January and, 6 February 2007. One was subsequently seen at Fairlands Valley Lakes and, the Town Centre Gardens between 10 and 12 October 2007.

They were not recorded again until 2011 when up to two were at Fairlands Valley Lakes between 25 and 29 July 2011.

Subsequent records prior to 2020 are; two on the GSK Site Lake on 21 December 2018; two at Fairlands Valley Lakes on 17 and 29 March 2019; two adults and four juveniles at Fairlands Valley Lakes on 17, 21 and 29 September and 6 October 2019 (assumed to be the birds that bred at The Park, Knebworth House that summer); eight at Fairlands Valley Lakes on 21 November 2019; three at Fairlands Valley Lakes from 24 to 1 December 2019; two at Fairlands Valley Lakes from 2 December 2019 until 12 January 2020, with 11 seen on 15 December.

The records for Fairlands Valley Lakes since 2020 are: four on 19 January 2020; one on 16 March 2020; up to nine between 23 and 27 July 2020; one on 28 October 2020; two adults and a juvenile seen between 26 September and 23 November 2021; seen in January, April, and August 2022 and up to seven on various dates from 28 September to 11 December; seen in January and May 2023 and up to nine between 14 July and 28 November 2023; between two and 10 seen on various dates between February and December 2024, 10 seen between 2 and 27 July 2024; three on 24 January 2025; one on 24 and 25 April and 11 May 2025; up to six between 10 and 25 June 2025; two on 8 and 17 July 2025; one between 28 July and 26 August 2025; up to five on various dates between 2 September and 14 October 2025.

Other records for Stevenage are: one flying over Norton Green Tip on 23 August 2022; one seen feeding among c.200 Canada Geese (Branta canadensis) at Astonbury Farm on 16 November 2022; two at Astonbury Farm on 29 October 2023.