Table 2.

Mortality rate between January 2014 and April 2016 in C. perspicillata colony

Month	Newborn	Young	Adult	Unknown	Total	Coefficient	t-value
Jan 14		2	1		3	−0.192	− 0.122
Feb 14		1	1		2	− 1.446	− 0.916
Mar 14		4	4		8	4.907	3.106
Apr 14		1			1	−2.358	−1.493
May 14		1			1	−2.137	−1.353
Jun 14	1	1		1	3	−0.402	−0.255
Jul 14	2	2	2	3	9	5.73	3.627
Aug 14		2	2		4	0.465	0.295
Sep 14			4		4	0.642	0.406
Oct 14	1	1	2	1	5	1.73	1.095
Nov 14		1	2		3	−0.314	−0.199
Dec 14		1	2		3	−0.137	−0.087
Jan 15	1				1	−2.137	−1.353
Feb 15		1			1	−2.182	−1.381
Mar 15		2	2		4	0.907	0.574
Apr 15			1	1	2	−1.137	−0.72
May 15					0	−3.182	−2.014
Jun 15		1	2		3	−0.049	− 0.031
Jul 15			2		2	−1.137	−0.72
Aug 15			1		1	−2.137	−1.353
Sep 15		1	1		2	−1.137	−0.72
Oct 15			3		3	−0.358	−0.227
Nov 15		2	1	4	7	3.818	2.417
Dec 15			2		2	−1.491	−0.943
Jan 16	1		3	1	5	1.686	1.067
Feb 16		1	5		6	2.642	1.672
Mar 16		3	1		4	0.686	0.434
Apr 16	1	1			2	−1.281	−0.81

The coefficients and t-values of the outliers’ detection analysis was performed only on the total number of dead bats. The critical value was set at 3.5 and significant t-value (July 2014) is in bold. This finding was attributed to an ongoing birth peak in combination with increased stress due to an unusually high number of visitors