title
400. Timberline Wren - Two singing birds at the roadside in Cerres de la Muerte 28/03.
401. White-breasted Wood-wren - One at La Selva 31/03 and single birds at Arenal 03/04 & 04/04.
402. Grey-breasted Wood-wren - Several small parties showed admirably at Santa Elena 22/03.
403. Nightingale Wren - Good views of a singleton and then a pair on the trails at Arenal 03/04 & 04/04.
404. Scaly-breasted Wren - Poor views of a skulking bird at Bosque del Rio Tigre 26/03.
405. Song Wren - One seen on the trails at Arenal 03/04, with better views of a pair at the same locality 04/04.
406. Tropical Mockingbird - A pair near Talari Lodge 28/03.
407. Grey Catbird - One at La Selva 31/03.
408. Black-faced Solitaire - Easily seen at Santa Elena 22/03 and in the Savegre valley 29 & 30/03.
409. Black-billed Nightingale-thrush - 5+ recorded at Cerro de la Muerte 28/03, and in the Savegre valley 29 & 30/03.
410. Orange-billed Nightingale-thrush - 3+ at Finca Ecologica 23/03 and 4+ around the gardens at Talari Lodge 28/03.
411. Slaty-backed Nightingale-thrush - 2+ birds gave awesome views at Santa Elena 22/03.
412. Ruddy-capped Nightingale-thrush - 6+ in the grounds of Savegre Lodge 29/03 & 30/03. 
413. Black-headed Nightingale-thrush - A pair showed very well from the Arenal Hanging Bridges 03/03, and a singleton on the trails at Arenal 04/04.
414. Swainson's Thrush - Recored in single figures on nine dates, the first in Palo Verde 21/03.
415. Wood Thrush - Recorded on four dates, the first and most obvious on the trails at Finca Ecologica 23/03.
416. Sooty Robin - Easily seen in mountaineous areas around the Savegre Valley 28-30/03. 
418. Clay-coloured Robin (Clay-coloured Thrush) - Seen every day, and very numerous. 
419. White-throated Thrush - Small numbers seen at sites around Monteverde 22/03 & 23/03 and two at Reserve Ecologica el Tapir 01/04.
420. Tawny-faced Gnatwren - A pair with a small mixed flock on the trails at Reserve Ecologica el Tapir 01/04.
421. Long-billed Gnatwren - Good views of single birds at Carara 24/03 and Bosque del Rio Tigre 26/03.
422. White-lored Gnatcatcher - A pair on the Guanacaste Road 20/03.
423. Tropical Gnatcatcher - Recorded on five dates, and often numerous - first recorded with 10+ at Palo Verde 21/03.
424. Brown Jay - Small parties seen in the Monteverde area 22 & 23/03 and in Carara 24&25/03.
425. White-throated Magpie-jay - Seen on three dates, along the Guanacaste Road 20/03; in Palo Verde 21/03 and near Monteverde 23/03.
426. House Sparrow - Recorded on eight dates.
427. Rufous-browed Peppershrike - One in the grounds of the Hotel Bougainville 20/03.
428. Green Shrike-vireo - One showed at Bosque del Rio Tigre 26/03.
429. Yellow-winged Vireo - Seen daily in small numbers in the Savegre Valley 28-30/03.
430. Yellow-throated Vireo - Single birds recorded on four dates, the first at Hotel Bougainville 20/03.
431. Philadelphia Vireo - Recorded on six dates, with good numbers particularly around Talari Lodge 28/03.
432. Red-eyed Vireo - Two at Talari Lodge 28/03.
433. Yellow-green Vireo - Recorded on five dates, the first near Monteverde 23/03.
434. Brown-capped Vireo - Two at Savegre Lodge 29/03.
435. Scrub Greenlet - One seen in the village at Bosque del Rio Tigre 27/03.
436. Tawny-crowned Greenlet - Birds seen at Carara 24/03; Bosque del Rio Tigre 26/03 and at Reserve Ecologica el Tapir 01/04.
437. Lesser Greenlet - Widepread and recorded on nine dates during the trip.
438. Yellow-bellied Siskin - 8+ around the reception area at Savegre Lodge 29/03 and 30/03, with smaller numbers along the mountain road.
439. Golden-winged Warbler - Single birds at Santa Elena 22/03, Finca Ecologica 23/03 and two at Reserve Ecologica el Tapir 01/04.
440. Tennessee Warbler - Recorded on every date in good numbers.
441. Tropical Parula - First recorded at Arenal Observatory Lodge 02/04, and seen in good numbers on the subsequent two dates.
442. Flame-throated Warbler - Good numbers (10+) recorded daily at Savegre Lodge 28-30/03.
443. Yellow Warbler - Very numerous, recorded on 12 dates.
Mangrove Warbler - 3+ at Chomez 21/03 and good numbers in the mangroves on the Tarcoles river trip 23/03.
444. Chestnut-sided Warbler - Recorded on nine dates, and very numerous.
445. Magnolia Warbler - One at Palo Verde 21/03.
446. Townsend's Warbler - One at Monteverde 22/03.
447. Black-throated Green Warbler - Recorded on six dates, the first two at Santa Elena 22/03.
448. Blackburnian Warbler - A stunning spring male at Arenal Observatory Lodge 04/04.
449. Bay-breasted Warbler - A gorgeous spring male at Bosque del Rio Tigre 26/03.
450. Cerulean Warbler - A female with a flock of migrant warblers at Arenal Observatory Lodge 03/04.
451. Black-and-white Warbler - Two at an ant swarm at Finca Ecologica 23/03 followed by one at Talari Lodge 28/03 and several on the trails at Reserve Ecologica el Tapir 01/04.
452. American Redstart - A male on the Tarcoles river trip 23/03 and a female on the La Gamba road 27/03.
453. Prothonotary Warbler - Two males seen on the Tarcoles river trip 23/03.
454. Northern Waterthrush - Recorded on eight dates, the first two at Chomez 21/03.
455. Kentucky Warbler - Single males at Finca Ecologica 23/03, Carara 24/03, Bosque del Rio Tigre 27/03 and 2+ at Arenal 03 & 04/04.
456. Mourning Warbler - One at Bosque del Rio Tigre 26/03; 2+ at La Gamba road 27/03 and one at Talari Lodge 28/03.
457. Common Yellowthroat - One at a small marsh near La Selva 01/04.
458. Olive-crowned Yellowthroat - One at La Selva 31/03.
459. Gray-crowned Yellowthroat - One on the Guancaste Road 20/03; near Tarcole Lodge 25/03 and at Arenal 04/04.
460. Hooded Warbler - A stunning male at La Selva 31/03.
461. Wilson's Warbler - Recorded on six dates, the first at Santa Elena 22/03.
462. Canada Warbler - Single birds at Reserve Ecologica el Tapir 01/04 and at the Arenal Hanging Bridges 03/04.
463. Slate-throated Redstart (Slate-throated Whitestart) - Good numbers present at Santa Elena and around Monteverde 22/03.
464. Collared Redstart (Collared Whitestart) - Good numbers at Santa Elena 22/03; 6+ at Savegre 29/03.
465. Golden-crowned Warbler - One at Monteverde 22/03; 4+ at Finca Ecologica 23/03 and 3+ at Arenal 04/04.
466. Rufous-capped Warbler - One at Palo Verde 21/03; 3+ at Finca Ecologica 23/03; 2+ at Carara 25/03 and 1+ at Arenal 03/04.
467. Black-cheeked Warbler - 4+ near Savegre Lodge 28/03 and 2+ at Savegre Lodge 29/03.
468. Three-striped Warbler - Several small parties at Santa Elena 22/03.
469. Buff-rumped Warbler - Two at Carara 24/03; one at Bosque del Rio Tigre 26/03; two at La Selva 31/03 and 4+ at the Arenal hanging bridges 03/04.
470. Zeledonia (Wrenthrush) - Two at Savegre 29/03 and one at Cerro de las Muertes 30/03.
471. Bananaquit - Recorded on six dates, the first at the Monteverde Hummingbird gallery 22/03.
472. Common Bush-tanager - Recorded in very large numbers at Santa Elena 22/03 and in the Savegre area 30/03.
473. Sooty-capped Bush-tanager - Small numbers at Santa Elena 22/03 and larger numbers in the Savegre area 28-30/03.
474. Ashy-throated Bush-tanager - One at Reserve Ecologica el Tapir 01/04.
475. Black-and-yellow Tanager - A pair at Reserve Ecologica el Tapir 30/03.
476. Dusky-faced Tanager - A party of 4+ at La Selva 31/03.
477. Olive Tanager - Large and loud raucous parties at Reserve Ecologica el Tapir 30/03 & 01/04; and at Arenal 03 & 04/04.
478. Grey-headed Tanager - A pair at Talari Lodge 28/03.
479. White-shouldered Tanager - Three at Carara 24/03 and several at Bosque del Rio Tigre 26/03.
480. White-lined Tanager - One at the La Gamba road 27/03.
481. Red-crowned Ant-tanager - A pair attending an army ant swarm at Finca Ecologica 23/03.
482. Red-throated Ant-tanager - Birds recorded on three dates, the best views involving a pair at La Selva 31/03.
483. Black-cheeked Ant-tanager - A pair at Bosque del Rio Tigre 26/03.
484. Flame-coloured Tanager - Several along the approach road to Savegre Lodge 28 & 29/03.
485. Hepatic Tanager - 4+ present around Arenal Observatory Lodge 03 & 04/04.
486. Summer Tanager - Recorded on 13 dates, especially numerous in Carara.
487. Scarlet Tanager - A male at Carara 24/03; several at Talari Lodge 28/03 and around Arenal 03 & 04/04.
488. Western Tanager - A male at Carara 25/03.
489. Crimson-collared Tanager - Single birds at La Selva 31/03 and Arenal 03/04.
490. Cherries Tanager - Recorded on five dates, and very common in the south. Replaced by the very similar Passerini's Tanager in the north.
491. Passerini's Tanager - First recorded at Reserve Ecologica el Tapir 30/03 and seen on each of the five subsequent dates in large numbers.
492. Blue-grey Tanager - Very common, recorded on 13 dates.
493. Palm Tanager - First recorded in Carara 24/03, and then on ten subsequent dates. 
494. Scrub Euphonia- A feamel on the Guanacaste Road 20/03 and a male near Tarcole Lodge 25/03.
495. Thick-billed Euphonia - 2+ present in the gardens at Bosque del Rio Tigre 26 & 27/03.
496. Yellow-crowned Euphonia - Pairs at Carara 24/03; Talari Lodge 28/03; La Selva 31/03 and in Cano Negro 02/04.
497. Yellow-throated Euphonia - A male at the Hotel Villa Lapas 24/03.
498. Spot-crowned Euphonia - Two at Bosque del Rio Tigre 26/03, with one 27/03.
499. Olive-backed Euphonia - 6+ at La Selva 31/03.
500. Tawny-capped Euphonia - 4+ at Reserve Ecologica el Tapir 01/04.
501. Golden-browed Chlorophonia - A pair near Monteverde 22/03 and two on the road to Savegre Lodge 29/03.
502. Silver-throated Tanager - One at Santa Elena 22/03; very large numbers at the feeding station at Vista del Valle on 28/03 and one at Savegre Lodge 30/03.
503. Speckled Tanager - One at Talari Lodge and large numbers at the feeding station at Vista del Valle restuarant on 28/03.
504. Bay-headed Tanager - One at Carara 24/03 and three at Arenal Observatory Lodge 04/04.
505. Rufous-winged Tanager - A pair at the Hanging Bridges at Arenal 03/04.
506. Golden-hooded Tanager - First recorded with 4+ at Bosque del Rio Tigre 26/03 and then on a subsequent four dates in good numbers. 
507. Spangle-cheeked Tanager - Several birds at Santa Elena 22/03 and one at Savegre Lodge 29/03.
508. Scarlet-thighed Dacnis - Single birds at Arenal Observatory Lodge 03 & 04/04.
509. Blue Dacnis - Two in Carara 25/03; 3+ at Bosque del Rio Tigre 26/03; one at Talari Lodge 28/03 and a female on the La Selva entrance road 31/03.
510. Green Honeycreeper - Four at Talari Lodge 28/03, and birds on a subsequent four dates.
511. Shining Honeycreeper - Two at Hotel Villa Lapas 24/03 and birds at Bosque del Rio Tigre 26/03 and La Selva 31/03.
512. Red-legged Honeycreeper - Recorded in large numbers on nine dates, the first in Carara 24/03.
513. Rufous-collared Sparrow - Recorded on six dates, the first in the grounds of the hotel Bougainville 20/03.
514. Volcano Junco - Excellent views of two along the Towers Road at Cerres de la Muerte 28/03.
515. Stripe-headed Sparrow - three at Colorado 20/03; two at Palo Verde 21/03 and two near Tarcole Lodge 25/03.
516. White-eared Ground-sparrow - A pair in the grounds of the Hotel Bougainville 20/03 and two pairs daily at Hotel Sapo Dorado 22 & 23/03.
517. Orange-billed Sparrow - A gorgeous species recorded on nine dates, firstly in Carara 24/03.
518. Olive Sparrow - Two near Monteverde 23/03 and one in scrub near Tarcole Lodge 25/03.
519. Black-striped Sparrow - Recorded on eight dates, the first a single bird near Tarcole Lodge 25/03.
520. Chestnut-capped Brush-finch - One at Santa Elena 22/03 and one visiting the feeding station at Vista del Valle restuarant 28/03.
521. Large-footed Finch - Two recorded on three dates (28-30/03) at Savegre.
522. Yellow-thighed Finch - Two at Santa Elena 22/03 and easily seen on all three dates (28-30/03) at Savegre.
523. Peg-billed Finch - Two seen at Cerre de la Muerte along the Towers Road 28/03.
524. Blue-black Grassquit - Recorded on four dates, the first involving 20+ at Chomez 21/03.
525. Variable Seedeater - Recorded on ten dates, the first in Carara 24/03.
526. White-collared Seedeater - Recorded on just three dates, the first a small party near Colorado 21/03.
527. Yellow-bellied Seedeater - Two on the La Gamba road 27/03.
528. Ruddy-breasted Seedeater - 6+ recorded on the La Gamba road 27/03.
529. Nicaraguan Seed-finch (Pink-billed Seed-finch) - Two at a small marsh near La Selva 01/04, and a singing male at Cano Negro 02/04.
530. Thick-billed Seed-finch - A female in Carara 25/03 and several birds on the La Gamba road 27/03.
531. Yellow-faced Grassquit - Recorded on five dates, the first at the Hotel Sapo Dorado 22/03.
532. Slaty Flowerpiercer - A pair at Santa Elena 22/03 and good numbers in the Savegre area 28-30/03, especially on the Towers Road.
533. Black-thighed Grosbeak - A singing male showed very well on two subsequent mornings 29-30/03 at Savegre Lodge. 
534. Rose-breasted Grosbeak - Recorded in small numbers on five dates, the first in Palo Verde 21/03.
535. Black-faced Grosbeak - 10+ at Reserve Ecologica el Tapir 30/03 & 01/04 and similar numbers on the entrance track to La Selva 31/03.
536. Black-headed Saltator - A pair on the entrance track at La Selva 31/03.
537. Buff-throated Saltator - Recorded on six dates, the first birds in Carara 24/03.
538. Greyish Saltator - Four in the grounds of the Hotel Bougainville 20/03.
539. Streaked Saltator - Two at a feeding station at Talari Lodge 28/03.
540. Blue Grosbeak - A male in Palo Verde 21/03.
541. Blue-black Grosbeak - Recorded on five dates, the first involving three in Carara 24/03.
542. Indigo Bunting - A male in Carara 25/03 and 4+ at La Gamba road 27/03.
543. Painted Bunting - 3+ at Chomez 21/03 and a stonking male at Carara 25/03. 
544. Chestnut-headed Oropendola - Small numbers seen at La Selva 31/03 and at Reserve Ecologica el Tapir 01/04.
545. Montezuma Oropendola - Recorded on eight dates, often in good numbers.
546. Scarlet-rumped Cacique - Four single birds recorded; at Bosque del Rio Tigre 26/03; La Selva 31/03; Reserve Ecologica el Tapir 01/04 and Arenal 03/04.
547. Spot-breasted Oriole - One seen at Colorado Salt Pans 20/03.
548. Streak-backed Oriole - One at Colorado 20/03 and several at the Hotel Las Lagunas 21/03.
549. Baltimore Oriole - Very numerous, recorded on 15 dates.
550. Orchard Oriole - A first-year male in Palo Verde 21/03 and 5+ in Cano Negro 02/04.
551. Black-cowled Oriole - 3+ at La Selva 31/03.
552. Red-winged Blackbird - Recorded on four dates, the first at the Hotel Las Lagunas 21/03.
553. Red-breasted Blackbird - 15+ on the La Gamba road 27/03.
554. Eastern Meadowlark - Recorded on five dates, the first near the airport 20/03.
555. Melodious Blackbird - One along the road near Tarcol Lodge 25/03.
556. Great-tailed Grackle - Seen on 15 dates in huge numbers.
557. Nicaraguan Grackle - 15+ recorded on the boat ride in Cano Negro 02/04.
558. Bronzed Cowbird - Recorded on nine dates, the first at the Hotel Bougainville 20/03.
559. Shiny Cowbird - A pair at La Gamba road 27/03.
560. Giant Cowbird - Up to 10+ at La Gamba road 27/03; singles at La Selva 31/03 and near Arenal Hanging Bridges 03/04.
MAMMALS
1. White-nosed Coati - Recorded on six dates, firstly in Palo Verde 21/03.
2. Northern Tamandua - One in Palo Verde 21/03.
3. Oncilla - Exceptional views of one on the trails at Arenal 03/04.
4. Variegated Squirrel - Numerous recorded on nine dates.
5. Red-tailed Squirrel - Recorded on four dates, easily seen around Talari Lodge 28/03. 
6. Central American Agouti - Several seen at Finca Ecologica 23/03 and Carara 24/03.
7. Collared Peccary - A couple of small family parties at La Selva 31/03.
8. Hoffmann's Two-toed Sloth - Singles in Orotina 20/03 and La Selva 31/03.
9. White-tailed Deer - One at Palo Verde 21/03.
10. Tent-making Bat - Seen in Carara 23/03 & 24/03.
11. Long-nosed/Probosis Bat - Awesome views of roosting groups at Bosque del Rio Tigre 26 & 27/03.
12. Mantled Howler Monkey - Recorded on six dates, the first in Palo Verde 21/03.
13. White-faced Capuchin - 10+ in Palo Verde 21/03.
14. Olingo - One at the Monteverde Hummingbird gallery 22/03.
15. Grey Fox - One at Monteverde 22/03.
16. Common Opossum - One on the night drive at Cano Negro 02/04.
MISCELLANEOUS