OK, well, there will probably be a few late additions to this, but here is the start of the full list for Costa Rica - a few corrected IDs from the earlier days:
San Jose, Poas Volcano and grounds of Zoologico Simon Bolivar:
90. Great-tailed Grackle - Quiscalus mexicanus
91. American Black Vulture - Coragyps atratus
92. Crimson-fronted Conure - Aratinga finschii
93. White-winged Dove - Zenaida asiatica
94. Great Kiskadee - Pitangus sulphuratus
95. Clay-coloured Robin - Turdus grayi
96. Bronzed Cowbird - Molothrus aeneus
97. Rufous-collared Sparrow - Zonotrichia capensis
98. Yellow-thighed Finch - Pselliophorus tibialis
99. Western Cattle Egret - Bubulcus ibis
100. Black Guan - Chamaepetes unicolor
101. Turkey Vulture - Cathartes aura
102. Baltimore Oriole - Icterus galbula
103. Blue-crowned Motmot - Momotus momota
104. Grey-necked Wood Rail - Aramides cajaneus
105. Blue-Grey Tanager - Thraupis episcopus
106. Green Kingfisher - Chloroceryle americana
107. Rufous-tailed Hummingbird - Amazilia tzatcatl
108. Grey Catbird - Dumetella carolinensis
109. Northern Waterthrush - Seiurus noveboracensis
110. Green Heron - Buteroides virescens
111. House Wren - Troglodytes aedon
112. Hoffmann's Woodpecker - Melanerpes hoffmannii
8. Variegated Squirrel -Sciurus variegatoides dorsalis (also later ssp. thomasi in Arenal)
9. Poas Squirrel - Syntheosciurus brochus
10. Red-tailed Squirrel - Sciurus granatensis
Tortuguero:
113. Short-billed Pigeon - Patagioenas nigrirostris
114. Spotted Sandpiper - Actitis macularius
115. Royal Tern - Thalasseus maximus
116. Montezuma Oropendola - Psarocolius montezuma
117. Variable Seedeater - Sporophila americana
118. Bare-throated Tiger Heron - Tigrisoma mexicanum
119. Social Flycatcher - Myiozetetes similis
120. Tropical Kingbird - Tyrannus melancholicus
121. Tropical Pewee - Contopus cinereus
122. Mangrove Swallow - Tachycineta albilinea
123. Sand Martin - Riparia riparia
124. Anhinga - Anhinga anhinga
125. Common Black-Hawk - Buteogallus anthracinus
126. Great White Egret - Ardea alba
127. Little Blue Heron - Egretta caerulea
128. Keel-billed Toucan - Ramphastos sulfuratus
129. Chestnut-mandibled Toucan - Ramphastos swainsonii
130. Collared Araçari - Pteroglossus torquatus
131. White-crowned Parrot - Pionus senilis
132. Ringed Kingfisher - Ceryle torquatus
133. Laughing Gull - Leucophaeus atricilla
134. Sandwich Tern - Thalasseus sandvicensis
135. Magnificent Frigatebird - Fregata magnificens
136. Northern Jacana - Jacana spinosa
137. Purple Gallinule - Porphyrio martinicensis
138. Red-lored Amazon - Amazona autumnalis
139. Sungrebe - Heliornis fulica
140. White-collared Manakin - Manacus candei
141. Neotropical Cormorant - Phalacrocorax brasilianus
142. Tricoloured Heron - Egretta tricolor
143. Snowy Egret - Egretta thula
144. Amazon Kingfisher - Chloroceryle amazona
145. Plain-brown Woodcreeper - Dendrocincla fuliginosa
146. Chestnut-coloured Woodpecker - Celeus castaneus
147. Pale-billed Woodpecker - Campephilus guatemalensis
148. Lineated Woodpecker - Dryocopos lineatus
149. Palm Tanager - Thraupis palmarum
150. Roadside Hawk - Buteo magnirostris
151. White-flanked Antwren - Myrmotherula axillaris
152. Slaty-tailed Trogon - Trogon massena
153. Chestnut-sided Warbler - Dendroica pensylvanica
154. Bright-rumped Attila - Attila spadiceus
155. Great Green Macaw - Ara ambiguus
156. Least Flycatcher - Empidonax minimus
157. Western Osprey - Pandion haliaetus
158. Barn Swallow - Hirundo rustica
159. Pale-vented Pigeon - Patagioenas cayennensis
160. Common Tody-Flycatcher - Todirostrum cinereum
161. Yellow-crowned Night Heron - Nyctanassa violacea
162. Olive-throated Conure - Aratinga nana
163. Boat-billed Heron - Cochlearius cochlearius
164. Chimney Swift - Chaetura pelagica
165. Summer Tanager - Piranga rubra
166. Olive-backed Euphonia - Euphonia gouldii
11. Mexican Prehensile-tailed Porcupine - Sphiggurus mexicanus
12. Mantled Howler Monkey - Alouatta palliata
13. Brown-throated Three-toed Sloth - Bradypus variegatus
14. White-throated Capuchin - Cebus capucinus
15. Brazilian Long-nosed Bat - Rhynchonycteris naso
16. Geoffroy's Spider Monkey - Ateles geoffroyi ornatus
17. Neotropical River Otter - Lontra longicaudis
18. Kinkajou - Potos flavus
1. Green Iguana - Iguana iguana
2. Plumed (Emerald) Basilisk - Basiliscus plumifrons
3. Four-lined Ameiva - Ameiva quadrilineata
4. Spectacled Caiman - Caiman crocodilus
5. Black Wood Turtle - Rhinoclemmys funerea
6. Common House Gecko - Hemidactylus frenatus
7. Ground Anole - Norops humilis
8. Slender Anole - Norops limifrons
9. Brown Wood Turtle - Rhinoclemmys annulata
10. Brown Basilisk - Basiliscus vittatus
11. Mesoamerican Slider - Trachemys venusta
12. Northern Cat-eyed Snake - Leptodeira septentrionalis
3. Marine Toad - Rhinella marina
4. Strawberry Poison Arrow Frog - Oophaga pumilio
5. Savage's Jungle Frog - Leptodactylus savageii
6. Red-eyed Tree Frog - Agalychnis callidryas
7. Common Dink Frog - Diasporus diastema
8. Mexican Tree Frog - Smilisca baudinii
9. Scarlet-webbed Tree Frog - Hypsiboas rufitelus
Arenal and Monteverde to follow...
San Jose, Poas Volcano and grounds of Zoologico Simon Bolivar:
90. Great-tailed Grackle - Quiscalus mexicanus
91. American Black Vulture - Coragyps atratus
92. Crimson-fronted Conure - Aratinga finschii
93. White-winged Dove - Zenaida asiatica
94. Great Kiskadee - Pitangus sulphuratus
95. Clay-coloured Robin - Turdus grayi
96. Bronzed Cowbird - Molothrus aeneus
97. Rufous-collared Sparrow - Zonotrichia capensis
98. Yellow-thighed Finch - Pselliophorus tibialis
99. Western Cattle Egret - Bubulcus ibis
100. Black Guan - Chamaepetes unicolor
101. Turkey Vulture - Cathartes aura
102. Baltimore Oriole - Icterus galbula
103. Blue-crowned Motmot - Momotus momota
104. Grey-necked Wood Rail - Aramides cajaneus
105. Blue-Grey Tanager - Thraupis episcopus
106. Green Kingfisher - Chloroceryle americana
107. Rufous-tailed Hummingbird - Amazilia tzatcatl
108. Grey Catbird - Dumetella carolinensis
109. Northern Waterthrush - Seiurus noveboracensis
110. Green Heron - Buteroides virescens
111. House Wren - Troglodytes aedon
112. Hoffmann's Woodpecker - Melanerpes hoffmannii
8. Variegated Squirrel -Sciurus variegatoides dorsalis (also later ssp. thomasi in Arenal)
9. Poas Squirrel - Syntheosciurus brochus
10. Red-tailed Squirrel - Sciurus granatensis
Tortuguero:
113. Short-billed Pigeon - Patagioenas nigrirostris
114. Spotted Sandpiper - Actitis macularius
115. Royal Tern - Thalasseus maximus
116. Montezuma Oropendola - Psarocolius montezuma
117. Variable Seedeater - Sporophila americana
118. Bare-throated Tiger Heron - Tigrisoma mexicanum
119. Social Flycatcher - Myiozetetes similis
120. Tropical Kingbird - Tyrannus melancholicus
121. Tropical Pewee - Contopus cinereus
122. Mangrove Swallow - Tachycineta albilinea
123. Sand Martin - Riparia riparia
124. Anhinga - Anhinga anhinga
125. Common Black-Hawk - Buteogallus anthracinus
126. Great White Egret - Ardea alba
127. Little Blue Heron - Egretta caerulea
128. Keel-billed Toucan - Ramphastos sulfuratus
129. Chestnut-mandibled Toucan - Ramphastos swainsonii
130. Collared Araçari - Pteroglossus torquatus
131. White-crowned Parrot - Pionus senilis
132. Ringed Kingfisher - Ceryle torquatus
133. Laughing Gull - Leucophaeus atricilla
134. Sandwich Tern - Thalasseus sandvicensis
135. Magnificent Frigatebird - Fregata magnificens
136. Northern Jacana - Jacana spinosa
137. Purple Gallinule - Porphyrio martinicensis
138. Red-lored Amazon - Amazona autumnalis
139. Sungrebe - Heliornis fulica
140. White-collared Manakin - Manacus candei
141. Neotropical Cormorant - Phalacrocorax brasilianus
142. Tricoloured Heron - Egretta tricolor
143. Snowy Egret - Egretta thula
144. Amazon Kingfisher - Chloroceryle amazona
145. Plain-brown Woodcreeper - Dendrocincla fuliginosa
146. Chestnut-coloured Woodpecker - Celeus castaneus
147. Pale-billed Woodpecker - Campephilus guatemalensis
148. Lineated Woodpecker - Dryocopos lineatus
149. Palm Tanager - Thraupis palmarum
150. Roadside Hawk - Buteo magnirostris
151. White-flanked Antwren - Myrmotherula axillaris
152. Slaty-tailed Trogon - Trogon massena
153. Chestnut-sided Warbler - Dendroica pensylvanica
154. Bright-rumped Attila - Attila spadiceus
155. Great Green Macaw - Ara ambiguus
156. Least Flycatcher - Empidonax minimus
157. Western Osprey - Pandion haliaetus
158. Barn Swallow - Hirundo rustica
159. Pale-vented Pigeon - Patagioenas cayennensis
160. Common Tody-Flycatcher - Todirostrum cinereum
161. Yellow-crowned Night Heron - Nyctanassa violacea
162. Olive-throated Conure - Aratinga nana
163. Boat-billed Heron - Cochlearius cochlearius
164. Chimney Swift - Chaetura pelagica
165. Summer Tanager - Piranga rubra
166. Olive-backed Euphonia - Euphonia gouldii
11. Mexican Prehensile-tailed Porcupine - Sphiggurus mexicanus
12. Mantled Howler Monkey - Alouatta palliata
13. Brown-throated Three-toed Sloth - Bradypus variegatus
14. White-throated Capuchin - Cebus capucinus
15. Brazilian Long-nosed Bat - Rhynchonycteris naso
16. Geoffroy's Spider Monkey - Ateles geoffroyi ornatus
17. Neotropical River Otter - Lontra longicaudis
18. Kinkajou - Potos flavus
1. Green Iguana - Iguana iguana
2. Plumed (Emerald) Basilisk - Basiliscus plumifrons
3. Four-lined Ameiva - Ameiva quadrilineata
4. Spectacled Caiman - Caiman crocodilus
5. Black Wood Turtle - Rhinoclemmys funerea
6. Common House Gecko - Hemidactylus frenatus
7. Ground Anole - Norops humilis
8. Slender Anole - Norops limifrons
9. Brown Wood Turtle - Rhinoclemmys annulata
10. Brown Basilisk - Basiliscus vittatus
11. Mesoamerican Slider - Trachemys venusta
12. Northern Cat-eyed Snake - Leptodeira septentrionalis
3. Marine Toad - Rhinella marina
4. Strawberry Poison Arrow Frog - Oophaga pumilio
5. Savage's Jungle Frog - Leptodactylus savageii
6. Red-eyed Tree Frog - Agalychnis callidryas
7. Common Dink Frog - Diasporus diastema
8. Mexican Tree Frog - Smilisca baudinii
9. Scarlet-webbed Tree Frog - Hypsiboas rufitelus
Arenal and Monteverde to follow...