In the winter, they will usually go deep underground and enter a hibernation-like state called brumation, which is characterized by a slowed metabolism and reduced activity.
1	In	in	ADP	IN	_	3	case	3:case	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
3	winter	winter	NOUN	NN	Number=Sing	8	obl	8:obl:in	SpaceAfter=No
4	,	,	PUNCT	,	_	8	punct	8:punct	_
5	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	8	nsubj	8:nsubj|12:nsubj	_
6	will	will	AUX	MD	VerbForm=Fin	8	aux	8:aux	_
7	usually	usually	ADV	RB	_	8	advmod	8:advmod	_
8	go	go	VERB	VB	VerbForm=Inf	0	root	0:root	_
9	deep	deep	ADV	RB	_	10	advmod	10:advmod	_
10	underground	underground	ADV	RB	_	8	advmod	8:advmod	_
11	and	and	CCONJ	CC	_	12	cc	12:cc	_
12	enter	enter	VERB	VB	VerbForm=Inf	8	conj	8:conj:and	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	17:det	_
14	hibernation	hibernation	NOUN	NN	Number=Sing	16	obl:npmod	16:obl:npmod	SpaceAfter=No
15	-	-	PUNCT	HYPH	_	16	punct	16:punct	SpaceAfter=No
16	like	like	ADJ	JJ	Degree=Pos	17	amod	17:amod	_
17	state	state	NOUN	NN	Number=Sing	12	obj	12:obj	_
18	called	call	VERB	VBN	Tense=Past|VerbForm=Part	17	acl	17:acl	_
19	brumation	brumation	NOUN	NN	Number=Sing	18	xcomp	18:xcomp|23:nsubj:pass	SpaceAfter=No
20	,	,	PUNCT	,	_	19	punct	19:punct	_
21	which	which	PRON	WDT	PronType=Rel	23	nsubj:pass	19:ref	_
22	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	23	aux:pass	23:aux:pass	_
23	characterized	characterize	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	19	acl:relcl	19:acl:relcl	_
24	by	by	ADP	IN	_	27	case	27:case	_
25	a	a	DET	DT	Definite=Ind|PronType=Art	27	det	27:det	_
26	slowed	slowed	ADJ	JJ	Degree=Pos	27	amod	27:amod	_
27	metabolism	metabolism	NOUN	NN	Number=Sing	23	obl	23:obl:by	_
28	and	and	CCONJ	CC	_	30	cc	30:cc	_
29	reduced	reduce	VERB	VBN	Tense=Past|VerbForm=Part	30	amod	30:amod	_
30	activity	activity	NOUN	NN	Number=Sing	27	conj	23:obl:by|27:conj:and	SpaceAfter=No
31	.	.	PUNCT	.	_	8	punct	8:punct	_
