CN ▁has ▁not ▁been ▁updated ▁yet . ▁In ▁any ▁case , ▁the ▁pre ca ution ary ▁principle ▁would ▁probably ▁require ▁a ▁few ▁years ▁of ▁follow - up ▁surve ys , ▁possible ▁now ▁that ▁rest oration ▁of ▁Gu ad alu pe ' s ▁e cos ystem ▁is ▁under way . ▁Despite ▁the ▁species ' ▁likely ▁ext inction , ▁the ▁two ▁other ▁storm - pet rel ▁species ▁that ▁are ▁also ▁en demic ▁bre ed ers ▁to ▁Gu ad alu pe ▁- ▁ ▁Town send ' s ▁and ▁Ain ley ' s ▁storm ▁pet rel s ▁- ▁still ▁surv ive ▁on ▁off sh ore ▁is lets . ▁ ▁Notes ▁ ▁See ▁also ▁ ▁C rypt ic ▁species ▁complex ▁ ▁References ▁ ▁External ▁links ▁Species ▁fact sheet ▁- ▁Bird Life ▁International ▁ ▁Gu ad alu pe ▁storm ▁pet rel ▁Category : B ird s ▁of ▁Mexico ▁Category : Ext inct ▁birds ▁of ▁North ▁America ▁Category : B ird ▁ext in ctions ▁since ▁ 1 5 0 0 ▁Gu ad alu pe ▁storm ▁pet rel <0x0A> </s> ▁John ▁Brit ton ▁may ▁refer ▁to : ▁ ▁John ▁Brit ton ▁( anti qu ary ) ▁( 1 7 7 1 – 1 8 5 7 ), ▁involved ▁in ▁ant ique ▁architecture ▁John ▁Brit ton ▁( bad m inton ), ▁Scottish - American ▁bad m inton ▁player ▁John ▁Brit ton ▁( base ball ), base ball ▁player ▁John ▁Brit ton ▁( do ctor ) ▁( 1 9 2 5 – 1 9 9 4 ), ▁abort ion ▁provider , ▁killed ▁by