Time of Day Surveys should only be conducted in the morning. Surveys may begin as early as 30 minutes before sunrise and all surveys for the morning should be completed by 4 hours after sunrise. Care should taken to avoid sampling locations at the same time of day during the 2 sampling periods (if point #1 is surveyed early during the first sampling period, it should be sampled later in the morning during the second sampling period). One common way of doing this is to record the order that points are sampled during the first sampling period and then reverse this order for the second period.
Suitable Weather Conditions Surveys should not be conducted if wind speeds are consistently in excess of 10 mph or if there is sustained rain or heavy fog. Additionally, surveyors should postpone surveys if they feel that climatic conditions are affecting the probability of grassland birds calling or affecting their ability to detect calling birds. If climatic conditions become adverse (wind speeds increase or rain starts) during the period of a point count survey, that point count should be cancelled and the data discarded. The point should be resurveyed at a later time (either later that morning if conditions improve or on another morning).
Species of Interest
- Eastern Meadowlark [EAME]
- Henslow’s Sparrow [HESP]
- Grasshopper Sparrow [GRSP]
- Upland Sandpiper [UPSA]
- Bobolink [BOBO]
- Field Sparrow [FISP]
- Red-Headed Woodpecker [RHWO]
- Brown Thrasher [BRTH]
These 8 species are the primary focus of this study. As such, it is of vital importance that surveyors concentrate their efforts on detecting and recording these species. Although it may be tempting to record other species as they are detected, doing so may limit the surveyor ability to detect and track the 8 focal species and will have negative consequences for the quality of the data collected. In some cases, surveyors will be working in teams of two. When 2 surveyors are present, 1 person will serve as the primary surveyor and will be solely responsible for surveying for the 8 primary species of interest. The second person will be responsible for documenting the presence of all other species at the site. It is vital that the 2 surveyors work independently and not exchange data during or after the point count survey.
Field Methods At the beginning of each day of sampling, each surveyor should be equipped with a list and corresponding maps of all points to be surveyed, a clip board, pencil, 1 point count data sheet for each point count to be conducted, a timer or stopwatch, a GPS unit with survey point locations entered into it, and a rangefinder. Upon arriving at a road-based survey location, surveyors will need to assess whether the placement of the survey point is appropriate (e.g., confirm that the point is at least 100 meters from the nearest building, not on a busy/noisy road, and that there is sufficient room to park a vehicle safely out of traffic). If necessary, the surveyor may adjust the survey point location by ≤50 meters to ensure that these conditions are met. If a suitable location cannot be found within 50 meters of the initial location, the point should be discarded and no survey conducted.
Upon arriving at a roadside survey location, carefully park the vehicle to the side of the road so as to not obstruct traffic. During early morning surveys, the vehicles parking lights should be left on and observers should wear a reflective vest. Collect all necessary equipment, exit the vehicle and find a place to stand where sounds will not be obstructed. Surveys consist of 2 parts: a 2-minute ‘rest’ period followed by a 5-minute 100-m radius point count. The 2-minute rest period allows birds to return to the area and commence their normal activities following the disturbance of the surveyor arriving at the site. During this time, the surveyor should limit their movements to minimize further disrupting birds. This time may be used to prepare data sheets and to estimate the distance to easily visible objects within the 100m radius point count circle using a laser rangefinder (e.g., signs, fence posts, trees, etc) and mark the distances on the map for reference. This time must not be used to begin locating birds and birds detected during this period cannot be recorded unless they are also detected during the following 5-minute point count (it is preferable for surveyor to actively avoid hearing/seeing birds during the rest period).
The 5-minute point count should begin immediately following the end of the 2-minute rest period. During the point count, observers should spend an equal amount of time facing both sides of the road. The 5-minute survey period should be treated as 5 consecutive 1-minute survey periods. During each 1-minute period, record the total number of individuals detected within 100 meters for each of the 8 focal species. The 2 exceptions to this protocol are Upland Sandpipers and Red-Headed Woodpeckers. These 2 species are rare across all study areas and therefore we will record all individuals detected regardless of distance.