Recovery Strategy for the Henslow’s Sparrow (Ammodramus henslowii) in Canada (2010-09-15)

Recovery Strategy for the Henslow’s Sparrow (Ammodramus henslowii) in Canada (2010-09-15)

The most recent record of Henslow’s Sparrow in the Ottawa-Gatineau area was an individual near Gloucester in 1999 that was present for two days in June.

Previous work on blood proteins suggested that the closest relative is Henslow’s Sparrow, A. henslowii (Zink and Avise 1990).

For example, as the densities of Henslow’s Sparrow increased within the landscape, breeding birds were found in smaller patches of grassland (Herkert 1994a; Herkert 1994b).

Henslow’s Sparrow Positive 1,5 Positive 3,6 Greater than 55 ha for occurrence 50% of maximum (1), mean occupied patch size 421 ha (26)

Similarly, patches separated by less than 15 kilometres may be appropriate for many other grassland bird species, including Upland Sandpiper and Henslow’s Sparrow.

Henslow’s Sparrow was officially assessed by the Committee on the Status of Wildlife in Canada (COSEWIC) as endangered in April 1993, and its status was confirmed in November 2000.