the temperature swings these guys endure here is kind of remarkable ,their body temp and the air temp i doubt are ever the same ......being outside with access to the sun , the ground ,plants and a pond , they are experts at finding heat ..... we had i think the sunniest march on record , not exceptionally warm , but exceptionally sunny ...... 80's first week of april , then 30's through most of the rest of april , last couple days of april in the 80's , may 1 was 33 , may 2nd was 80 ,may 6 was 36 , may 13 was 35 , we been 80-90 since may 18 ....... they're calling for 40's this friday ....... somehow they figure it out