Fig. 2 in Vulnerability of Northern Pine Snakes (Pituophis melanoleucus Daudin, 1803) during fall den ingress in New Jersey, USA

Fig. 2. All activity of snakes at den 1 (Bass River State Forest) in 2017 as a function of date and soil surface temperature. The colored markers indicated by 9-digit numbers in the legend represent individually tagged snakes. Data for snakes during the period from 29 October to 11 November (red line) were not recorded because the maximum number of data points the receiver could store was reached.